Flexible circuit board and touch screen structure

Abstract

This application relates to the field of circuit board technology and discloses a flexible circuit board, including a flexible circuit board body, an edge band, and a touch screen. A baffle is fixedly connected to the upper end of the flexible circuit board body. A sealing ring is fixedly connected to the end of the baffle away from the flexible circuit board body, and an insert plate is fixedly connected to the end of the baffle away from the flexible circuit board body. Multiple contacts arranged in a linear array are fixedly connected to both sides of the insert plate. An installation groove is formed inside the edge band, and bending grooves are formed on both sides of the edge band. This flexible circuit board and touch screen structure, by wrapping the flexible circuit board body with the edge band, utilizes its elasticity to buffer external impacts, reducing the risk of edge damage caused by collisions or compression. The bending groove design on both sides of the edge band guides the stress distribution of the flexible circuit board during bending, reducing the probability of breakage. This flexible circuit board, through the edge band design, protects the edges, thereby improving the product's durability and other advantages.

Description

Technical Field

[0001] This application relates to the field of circuit board technology, specifically to a flexible circuit board and touch screen structure. Background Technology

[0002] Flexible printed circuit boards (FPCs) originated in the 1970s and were initially used in the aerospace field to meet the needs of devices for high reliability, lightweight and flexibility. With the trend of thinner and smaller consumer electronics products, the demand for FPCs in fields such as smartphones, wearable devices and automotive electronics has surged.

[0003] However, due to material properties and structural limitations, the edges of existing flexible circuit boards are relatively weak in terms of tear and impact resistance, making them prone to damage and cracks or breaks during bending, assembly, or transportation. Utility Model Content

[0004] To address the shortcomings of existing technologies, this application provides a flexible circuit board and touch screen structure that has advantages such as improved tear resistance of flexible circuit boards. It solves the problem that existing flexible circuit boards have weak tear and impact resistance at the edges due to material properties and structural limitations, making them prone to damage and cracking or breaking during bending, assembly, or transportation.

[0005] To achieve the above objectives, this application provides the following technical solution: a flexible circuit board, comprising a flexible circuit board body, an edge band, and a touch screen. A baffle is fixedly connected to the upper end of the flexible circuit board body. A sealing ring is fixedly connected to the end of the baffle away from the flexible circuit board body. An insert plate is fixedly connected to the end of the baffle away from the flexible circuit board body. Multiple contact points arranged in a linear array are fixedly connected to both sides of the insert plate. An installation groove is provided inside the edge band, and bending grooves are provided on both sides of the edge band.

[0006] The above solution utilizes the elasticity of the edge-wrapping to buffer external impacts, reducing the risk of edge damage caused by collisions or compression. The bending grooves on both sides of the edge-wrapping guide the stress distribution of the flexible circuit board during bending, reducing the probability of breakage. The silicone sealing ring at the end of the baffle prevents the entry of dust, moisture, and other impurities, ensuring the reliability of the connection and extending the service life of the equipment. This flexible circuit board protects its edges through the edge-wrapping design, thereby improving the product's durability and other advantages.

[0007] Furthermore, the flexible circuit board body includes a substrate, a copper foil is fixedly connected to the upper end of the substrate, and a coating is fixedly connected to the upper end of the copper foil.

[0008] Through the above scheme, the substrate uses flexible insulating material, which makes the circuit board have good flexibility and can adapt to the needs of dynamic bending. Copper foil is used as a conductive layer, which can realize high-density wiring and meet the needs of complex circuit design. The coating is covered on the copper foil. The coating has excellent wear resistance, corrosion resistance and high temperature resistance, which can protect the circuit from the influence of the external environment.

[0009] Furthermore, the flexible circuit board body is fixedly installed inside the mounting groove.

[0010] The above solution uses a mounting groove to physically fix the flexible circuit board body, preventing it from shifting or bending excessively under vibration, impact, or external force, thus reducing the risk of circuit breakage.

[0011] Furthermore, the sealing ring is made of silicone.

[0012] The above solution utilizes the soft and highly elastic silicone material, which can tightly fit the gap between the mounting groove and the edge, effectively preventing dust, moisture and other contaminants from entering the circuit board area. The silicone can maintain stable performance under extreme temperatures, making it suitable for sealing performance in complex environments such as automotive equipment and outdoor equipment.

[0013] Furthermore, the edging is made of rubber.

[0014] Through the above solution, the rubber material has high elasticity, which can absorb external impact and reduce the risk of deformation or breakage of the flexible circuit board body due to vibration or drop.

[0015] Furthermore, the substrate is made of polyimide.

[0016] Through the above methods, the tensile strength of the polyimide film is not easily fatigued and cracked during repeated bending, and polyimide also has high heat resistance, allowing it to be used for a long time in complex environments.

[0017] A touch screen structure includes the aforementioned flexible circuit board, wherein a connector is fixedly connected to one side of the touch screen surface, a positioning groove is provided on one side of the connector, and a slot is provided inside the positioning groove.

[0018] With the above solution, the connector is fixed to one side of the touch screen surface, and the slot serves as the interface with the flexible circuit board to realize the transmission of electrical signals. It is used to accommodate the baffle and limit the position of the plug-in board to ensure connection stability.

[0019] Furthermore, a plate is slidably disposed inside the slot, and a baffle is slidably disposed inside the positioning groove.

[0020] With the above solution, the slot is located inside the positioning groove of the connector and is used to accommodate and fix the connecting plate of the flexible circuit board. Inside the plate, it serves as the physical contact medium between the flexible circuit board and the connector, enabling the transmission of electrical signals.

[0021] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0022] This flexible circuit board and touch screen structure uses an edge-wrapping system to wrap the flexible circuit board body, utilizing its elasticity to buffer external impacts and reduce the risk of edge damage caused by collisions or compression. The bending groove design on both sides of the edge-wrapping system guides the stress distribution of the flexible circuit board when bending, reducing the probability of breakage. The silicone sealing ring at the end of the baffle is used to prevent the entry of dust, moisture and other impurities, ensuring the reliability of the connection and extending the service life of the device. This flexible circuit board protects the edges through the edge-wrapping system, thereby improving the durability of the product and other advantages. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this application;

[0024] Figure 2 This is a schematic diagram of the flexible circuit board structure of this application;

[0025] Figure 3 This is a schematic diagram of the edge-binding structure of the present application.

[0026] Figure 4 This is a schematic diagram of the touchscreen mounting structure of this application.

[0027] Figure 5 This is a cross-sectional view of the flexible circuit board structure of this application;

[0028] Figure 6 for Figure 4 Enlarged view of point A in the middle.

[0029] In the picture:

[0030] 1. Flexible circuit board body; 101. Substrate; 102. Copper foil; 103. Coating; 2. Baffle; 3. Sealing ring; 4. Insert plate; 5. Contact point; 6. Edge banding; 7. Mounting groove; 8. Bending groove; 9. Touch screen; 10. Connector; 11. Positioning groove; 12. Slot. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] Please see Figure 1 , Figure 2 and Figure 3 This embodiment of a flexible circuit board includes a flexible circuit board body 1, an edging 6, and a touch screen 9. A baffle 2 is fixedly connected to the upper end of the flexible circuit board body 1. A sealing ring 3 is fixedly connected to the end of the baffle 2 away from the flexible circuit board body 1. The silicone sealing ring 3 at the end of the baffle 2 is used to block the entry of dust, moisture, and other impurities, ensuring the reliability of the connection and extending the service life of the equipment. An insert plate 4 is fixedly connected to the end of the baffle 2 away from the flexible circuit board body 1. Multiple contact points 5 arranged in a linear array are fixedly connected to both sides of the insert plate 4. An installation groove 7 is opened inside the edging 6. The edging 6 wraps around the flexible circuit board body 1, using its elasticity to buffer external impacts and reduce the risk of damage to the edge caused by collision or squeezing. Bending grooves 8 are opened on both sides of the edging 6. The bending grooves 8 on both sides of the edging 6 are designed to guide the stress distribution of the flexible circuit board when bending, reducing the probability of the flexible circuit board breaking.

[0033] Please see Figure 1 , Figure 4 and Figure 5The flexible circuit board body 1 includes a substrate 101, with a copper foil 102 fixedly connected to the upper end of the substrate 101 and a coating film 103 fixedly connected to the upper end of the copper foil 102. The substrate 101 uses a flexible insulating material, giving the circuit board good flexibility and the ability to adapt to dynamic bending requirements. The copper foil 102 serves as a conductive layer, enabling high-density wiring to meet the needs of complex circuit designs. The coating film 103 covers the copper foil 102 and has excellent wear resistance, corrosion resistance, and high-temperature resistance, protecting the circuit from external environmental influences. The flexible circuit board body 1 is fixedly disposed inside a mounting groove 7. The mounting groove 7 physically limits and fixes the flexible circuit board body 1, preventing it from shifting or over-displaced under vibration, impact, or external force. The flexible circuit board 1 is designed to withstand bending and reduce the risk of circuit breakage. The sealing ring 3 is made of silicone, which is soft and highly elastic, and can fit tightly between the mounting groove 7 and the baffle 2, effectively preventing dust, moisture and other contaminants from entering the circuit board area. Silicone can maintain stable performance at extreme temperatures and is suitable for sealing performance in complex environments such as automotive equipment and outdoor equipment. The edge banding 6 is made of rubber, which is highly elastic and can absorb external impacts, reducing the risk of deformation or breakage of the flexible circuit board body 1 due to vibration or drops. The substrate 101 is made of polyimide. The tensile strength of the polyimide film makes it less prone to fatigue cracking during repeated bending. Polyimide also has high heat resistance and can be used for a long time in complex environments.

[0034] Please see Figure 1 , Figure 4 and Figure 6 A touch screen structure includes the aforementioned flexible circuit board. A connector 10 is fixedly connected to one side of the surface of the touch screen 9. A positioning groove 11 is formed on one side of the connector 10, and a slot 12 is formed inside the positioning groove 11. The connector 10 is fixed to one side of the surface of the touch screen 9. The slot 12 serves as an interface with the flexible circuit board to realize electrical signal transmission. It is used to accommodate a baffle 2 and restrict the position of the insert plate 4 to ensure connection stability. The insert plate 4 is slidably disposed inside the slot 12, and the baffle 2 is slidably disposed inside the positioning groove 11. The slot 12 is located inside the positioning groove 11 of the connector 10 and is used to accommodate and fix the connecting insert plate 4 of the flexible circuit board. The insert plate 4 is slidably disposed inside the slot 12 and serves as a physical contact medium between the flexible circuit board and the connector 10 to realize electrical signal transmission.

[0035] In this embodiment, the flexible circuit board and touch screen structure wraps the flexible circuit board body 1 with an edge 6, which uses its elasticity to buffer external impacts and reduce the risk of edge damage caused by collision or squeezing. The bending grooves 8 on both sides of the edge 6 can guide the stress distribution of the flexible circuit board when bending, reducing the probability of the flexible circuit board breaking. The silicone sealing ring 3 at the end of the baffle 2 is used to block the entry of dust, moisture and other impurities, ensuring the reliability of the connection and extending the service life of the device. The flexible circuit board protects the edges through the edge 6, thereby improving the durability of the product and other advantages.

[0036] The working principle of the above embodiments is as follows:

[0037] The flexible circuit board body 1 is embedded in the mounting groove 7 of the edge band 6, so that the edge band 6 wraps around the edge of the circuit board. The rubber material of the edge band 6 absorbs the impact force of external collision or compression, reducing the risk of damage to the edge of the circuit board. The bending grooves 8 on both sides of the edge band 6 guide the stress distribution of the flexible circuit board when bending, reducing the probability of the flexible circuit board breaking. The baffle 2 is fixed to the upper end of the flexible circuit board body 1. The end of the baffle 2 integrates a silicone sealing ring 3 and a plug plate 4. The silicone sealing ring 3 fits tightly against the gap between the mounting groove 7 and the plug plate 4, preventing dust, moisture and other impurities from entering the circuit board area. The silicone sealing ring 3 blocks external pollutants and ensures the reliability of the connection. The baffle 2 provides physical support for the plug plate 4, ensuring the docking accuracy between the plug plate 4 and the connector 10. The plug plate 4 of the flexible circuit board is slid into the slot 12 of the connector 10. The contacts 5 on both sides of the plug plate 4 contact the slot 12 to realize the electrical signal transmission between the flexible circuit board and the touch screen 9. The positioning groove 11 and physical limit ensure that the plug plate 4 does not fall off under vibration or impact, maintaining the connection stability.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0039] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flexible circuit board comprising a flexible circuit board body (1), an edge wrap (6) and a touch screen (9), characterized in that: A baffle (2) is fixedly connected to the upper end of the flexible circuit board body (1). A sealing ring (3) is fixedly connected to the end of the baffle (2) away from the flexible circuit board body (1). A plug plate (4) is fixedly connected to the end of the baffle (2) away from the flexible circuit board body (1). Multiple contact points (5) arranged in a linear array are fixedly connected to both sides of the plug plate (4). An installation groove (7) is opened inside the edging (6). Bending grooves (8) are opened on both sides of the edging (6).

2. The flexible circuit board of claim 1, wherein: The flexible circuit board body (1) includes a substrate (101), a copper foil (102) is fixedly connected to the upper end of the substrate (101), and a coating (103) is fixedly connected to the upper end of the copper foil (102).

3. The flexible circuit board of claim 1, wherein: The flexible circuit board body (1) is fixedly installed inside the mounting groove (7).

4. The flexible circuit board of claim 1, wherein: The sealing ring (3) is made of silicone.

5. The flexible circuit board of claim 1, wherein: The edging (6) is made of rubber.

6. The flexible circuit board of claim 2, wherein: The substrate (101) is made of polyimide.

7. A touch screen structure characterized by: The flexible circuit board includes any one of claims 1-6, wherein a connector (10) is fixedly connected to one side of the surface of the touch screen (9), a positioning groove (11) is provided on one side of the connector (10), and a slot (12) is provided inside the positioning groove (11).

8. The touch screen structure of claim 7, wherein: The slot (12) is slidably provided with a plate (4), and the positioning groove (11) is slidably provided with a baffle (2).

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