Flexible circuit board splicing structure

Abstract

The utility model discloses a flexible circuit board make-up structure, which belongs to the technical field of flexible circuit boards and comprises a main board body, a first positioning hole is arranged on the outer side of the main board body, a first circuit board and a second circuit board are arranged inside the main board body, a solder mask is connected to the bottom of the first circuit board, and the solder mask is connected to the bottom of the second circuit board. A solder mask is arranged on the main board body, a second positioning hole is formed above the solder mask in a penetrating mode, a second circuit board is arranged above the solder mask, reinforcing ribs are arranged on the edge of the inner side of the main board body and connected to the first circuit board, and the first circuit board, the solder mask and the second circuit board form a unit structure. The flexible circuit board splicing structure solves the problems that an existing flexible circuit board splicing structure is weak in connection strength, low in positioning precision and inconvenient to cut and separate, the connection strength and stability are improved, cutting separation and quality detection are facilitated, and the product quality and the production efficiency are improved.

Description

Technical Field

[0001] This utility model relates to the field of flexible circuit board technology, specifically a flexible circuit board panel structure. Background Technology

[0002] Flexible printed circuit boards (FPCs), also known as flexible circuit boards, are printed circuit boards made with polyimide or polyester film as the substrate, possessing high reliability and excellent flexibility. They feature high wiring density, light weight, thinness, and bendability, allowing them to adapt to various complex shapes and spatial requirements. They are widely used in electronic products such as mobile phones, computers, and digital cameras, effectively enabling electrical connections and signal transmission for internal electronic components. In the manufacturing process of flexible printed circuit boards (FPCs), to improve production efficiency and reduce costs, multiple small flexible circuit boards are usually assembled together using a panelization method. However, the existing panelization structure of flexible circuit boards still has certain problems in use:

[0003] For example, the SMT panel structure for flexible circuit boards described in application number 202322683340.6 has the following technical solution: multiple flexible circuit board panels are provided, each panel having multiple flexible circuit boards; the flexible circuit boards are arranged horizontally, with adjacent panels having a height difference in the vertical direction, and spaced panels having the same vertical height; each panel has a component area at its bottom; positioning holes are provided on both sides of the panel; and an SMT positioning fixture with positioning posts on both sides that fit the positioning holes can stack and fix multiple flexible circuit board panels, with each panel fixed at a different height, exposing all component areas. However, during the panelization process, the connection strength and positioning accuracy between the individual boards are difficult to guarantee, which may lead to board displacement or separation during subsequent processing, transportation, or use, affecting product quality and production efficiency. Furthermore, cutting and separating the individual boards is not convenient and can easily damage the circuit boards.

[0004] In view of this, in-depth research was conducted on the above issues, which led to the creation of this case.

[0005] To address the aforementioned issues, an innovative design was implemented based on the existing flexible circuit board panel structure. Utility Model Content

[0006] The purpose of this invention is to provide a flexible circuit board panel structure to solve the problems mentioned in the background art, such as weak connection strength, easy deviation, and inconvenient cutting and separation.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A flexible circuit board panel structure includes a main board body, a first positioning hole on the outer side of the main board body, and a first circuit board and a second circuit board inside the main board body. A solder resist plate is connected to the bottom of the first circuit board, and a second positioning hole is provided through the top of the solder resist plate. The second circuit board is provided above the solder resist plate. A reinforcing rib is provided on the inner edge of the main board body and is connected to the first circuit board. The first circuit board, the solder resist plate and the second circuit board constitute a unit structure.

[0009] Preferably, a plurality of first positioning holes are evenly provided on the outer side of the motherboard body, and the first positioning holes cooperate with the positioning posts on the production equipment to form a panel positioning structure.

[0010] By adopting the above technical solution, the first positioning holes evenly opened on the outer side of the motherboard body cooperate with the positioning posts on the production equipment, which can accurately position the assembly during the production process, improve the accuracy and consistency of production, reduce processing problems caused by positioning deviations, and ensure product quality.

[0011] Preferably, the slots between the first circuit board and the main board are provided with reinforcing ribs, and the first circuit board and the second circuit board are connected by several connecting bridges.

[0012] The above technical solution enhances the overall structural strength by setting reinforcing ribs in the slot between the first circuit board and the main board, preventing the first circuit board from separating from the main board. The connecting bridge between the first circuit board and the second circuit board firmly connects the two circuit boards, preventing displacement during processing and transportation, and ensuring the stability of the panel structure.

[0013] Preferably, a cutting groove is provided between the unit consisting of the first circuit board, the solder resist plate, and the second circuit board, and the cutting groove is provided on the surface of the main board.

[0014] By adopting the above technical solution, the cutting grooves set between the units facilitate the separation of each unit in the later stage of production. Cutting along the cutting grooves makes the operation simpler, effectively reduces damage to the circuit board, and improves the efficiency of cutting and separation and the yield.

[0015] Preferably, the resist plate has a resist groove on the left side, and the first circuit board has a welding pad on the right side, and the welding pad is connected to the inside of the resist groove.

[0016] By adopting the above technical solution, the solder resist groove of the solder resist plate cooperates with the soldering pad of the first circuit board to prevent solder from overflowing during soldering, ensure soldering quality, avoid circuit failures caused by soldering problems, and improve the electrical performance and reliability of the circuit board.

[0017] Preferably, the first circuit board is L-shaped and has several circuit layers inside, and the area of ​​the second circuit board is smaller than that of the first circuit board.

[0018] Using the above technical solution, the first circuit board is L-shaped, which can be flexibly laid out according to the actual use scenario. The internal circuit layer can reasonably plan the circuit routing to meet the diverse circuit design needs of electronic boards of different sizes and improve the applicability of the circuit board.

[0019] Preferably, a reinforcing plate is provided at the top of the first circuit board, and several test points are provided on the outer side of the reinforcing plate.

[0020] By adopting the above technical solution, the reinforcing plate at the top of the first circuit board enhances the mechanical strength of this part, preventing damage due to external forces during use. The test points on the outside of the reinforcing plate facilitate electrical performance testing of the circuit board, making it easier to detect and resolve circuit problems in a timely manner and ensuring product quality.

[0021] Compared with the prior art, the beneficial effects of this utility model are: the flexible circuit board panel structure,

[0022] 1. Improved connection strength and stability: The connection strength between the first and second circuit boards is enhanced by the setting of the connecting bridge and the connection between the first circuit board and the main board body through the reinforcing ribs. This provides installation space for circuit boards of different sizes, reduces material loss, and effectively avoids circuit board displacement or separation during processing, transportation or use. This improves the stability of the panel structure and ensures product quality.

[0023] 2. Facilitates quality inspection and welding. The test points and reasonable welding structure design facilitate electrical performance testing and ensure welding quality. The solder resist plate has a solder resist groove on the left side, and the first circuit board has a welding pad on the right side. The welding pad is connected to the inside of the solder resist groove. The solder resist groove of the solder resist plate cooperates with the welding pad of the first circuit board to prevent solder overflow during welding, ensure welding quality, avoid circuit failures caused by welding problems, and improve the electrical performance and reliability of the circuit board. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the front structure of this utility model;

[0025] Figure 2 This utility model Figure 1 Enlarged structural diagram at point A in the middle;

[0026] Figure 3 This is a schematic diagram of the front cross-sectional structure of the first circuit board of this utility model;

[0027] Figure 4 This is a schematic diagram of the connection structure between the first circuit board and the solder resist plate of this utility model;

[0028] Figure 5This is a schematic diagram of the separation structure of the first circuit board and the solder resist plate of this utility model.

[0029] In the diagram: 1. Main board body; 2. First positioning hole; 3. First circuit board; 4. Solder resist plate; 5. Second circuit board; 6. Cutting groove; 7. Connecting bridge; 8. Reinforcing rib; 9. Second positioning hole; 10. Solder resist groove; 11. Soldering pad; 13. Reinforcing plate; 14. Test point; 15. Circuit layer. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Please see Figure 1-5 This utility model provides a technical solution:

[0032] A flexible circuit board panel structure includes a main board body 1, a first positioning hole 2 on the outer side of the main board body 1, and a first circuit board 3 and a second circuit board 5 inside the main board body 1. A solder resist plate 4 is connected to the bottom of the first circuit board 3, and a second positioning hole 9 is provided through the top of the solder resist plate 4. The second circuit board 5 is provided above the solder resist plate 4. A reinforcing rib 8 is provided on the inner edge of the main board body 1 and is connected to the first circuit board 3. The first circuit board 3, the solder resist plate 4 and the second circuit board 5 constitute a unit structure.

[0033] A plurality of first positioning holes 2 are evenly provided on the outer side of the main board body 1, and the first positioning holes 2 cooperate with the positioning posts on the production equipment to form a panel positioning structure. The first positioning holes 2 evenly provided on the outer side of the main board body 1 cooperate with the positioning posts on the production equipment to accurately position the panel during the production process, improve the accuracy and consistency of production, reduce processing problems caused by positioning deviations, and ensure product quality.

[0034] Reinforcing ribs 8 are provided in the slots between the first circuit board 3 and the main board 1, and several connecting bridges 7 connect the first circuit board 3 and the second circuit board 5. Cutting grooves 6 are provided between the units formed by the first circuit board 3, the solder resist plate 4, and the second circuit board 5, and the cutting grooves 6 are located on the surface of the main board 1. The reinforcing ribs 8 in the slots between the first circuit board 3 and the main board 1 enhance the overall structural strength and prevent the first circuit board 3 from separating from the main board 1. The connecting bridges 7 between the first circuit board 3 and the second circuit board 5 firmly connect the two circuit boards, preventing displacement during processing and transportation, and ensuring the stability of the panel structure. The cutting grooves 6 between the units facilitate the separation of each unit in the later stages of production. Cutting along the cutting grooves 6 makes the operation simpler, effectively reduces damage to the circuit boards, and improves the efficiency of cutting and separation and the yield.

[0035] The solder resist plate 4 has a solder resist groove 10 on its left side, and the first circuit board 3 has a soldering pad 11 on its right side. The soldering pad 11 is connected to the inside of the solder resist groove 10. The solder resist groove 10 of the solder resist plate 4 and the soldering pad 11 of the first circuit board 3 cooperate to prevent solder from overflowing during soldering, ensure soldering quality, avoid circuit failures caused by soldering problems, and improve the electrical performance and reliability of the circuit board.

[0036] The first circuit board 3 is L-shaped and has several circuit layers 15 inside. The second circuit board 5 has a smaller area than the first circuit board 3. A reinforcing plate 13 is provided at the top of the first circuit board 3, and several test points 14 are provided on the outside of the reinforcing plate 13. The L-shaped design of the first circuit board 3 allows for flexible layout according to actual usage scenarios. The internal circuit layers 15 can reasonably plan circuit routing to meet the diverse circuit design needs of electronic boards of different sizes, improving the applicability of the circuit board. The reinforcing plate 13 at the top of the first circuit board 3 enhances the mechanical strength of this part, preventing damage due to external forces during use. The test points 14 on the outside of the reinforcing plate 13 facilitate electrical performance testing of the circuit board, making it easier to detect and solve circuit problems in a timely manner and ensure product quality.

[0037] Working principle:

[0038] In the production process of this utility model, the main board 1 is positioned by cooperating with the positioning post on the production equipment through the first positioning hole 2, ensuring the accurate position of the entire assembly during processing. In subsequent processing stages, the unit structure composed of the first circuit board 3, the solder resist plate 4, and the second circuit board 5 maintains a stable connection under the action of the reinforcing rib 8 and the connecting bridge 7, preventing displacement. When soldering is required on the circuit board, the soldering pad 11 of the first circuit board 3 cooperates with the solder resist groove 10 of the solder resist plate 4 to prevent solder overflow and ensure soldering quality. After the overall processing of the circuit board is completed, the individual unit structures can be separated along the cutting groove 6 on the surface of the main board 1 to obtain independent circuit boards. During the processing and finished product inspection stages, the electrical performance of the circuit board can be tested through the test point 14 on the outside of the reinforcing plate 13 on the first circuit board 3 to ensure product quality.

[0039] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flexible circuit board panel structure, comprising a main board body (1), characterized in that: The main board body (1) has a first positioning hole (2) on its outer side, and a first circuit board (3) and a second circuit board (5) are provided inside the main board body (1). The bottom of the first circuit board (3) is connected to a solder resist plate (4), and a second positioning hole (9) is provided through the top of the solder resist plate (4). The second circuit board (5) is provided above the solder resist plate (4). A reinforcing rib (8) is provided on the inner edge of the main board body (1), and the reinforcing rib (8) is connected to the first circuit board (3). The first circuit board (3), the solder resist plate (4), and the second circuit board (5) constitute a unit structure.

2. The flexible circuit board panel structure according to claim 1, characterized in that: The main body (1) has a plurality of first positioning holes (2) evenly distributed on its outer side, and the first positioning holes (2) cooperate with the positioning posts on the production equipment to form a panel positioning structure.

3. The flexible circuit board panel structure according to claim 1, characterized in that: The slots between the first circuit board (3) and the main board body (1) are provided with reinforcing ribs (8), and the first circuit board (3) and the second circuit board (5) are connected by several connecting bridges (7).

4. The flexible circuit board panel structure according to claim 1, characterized in that: A cutting groove (6) is provided between the unit consisting of the first circuit board (3), the solder resist plate (4), and the second circuit board (5), and the cutting groove (6) is provided on the surface of the main body (1).

5. The flexible circuit board panel structure according to claim 1, characterized in that: The resist plate (4) has a resist groove (10) on the left side, and the first circuit board (3) has a welding pad (11) on the right side, and the welding pad (11) is connected to the inside of the resist groove (10).

6. The flexible circuit board panel structure according to claim 1, characterized in that: The first circuit board (3) is L-shaped and has several circuit layers (15) inside, and the area of ​​the second circuit board (5) is smaller than that of the first circuit board (3).

7. A flexible circuit board panel structure according to claim 6, characterized in that: The first circuit board (3) has a reinforcing plate (13) at its top, and a number of test points (14) are provided on the outside of the reinforcing plate (13).

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