Novel FPC (Flexible Printed Circuit) structure of capacitive touch screen

Abstract

The utility model discloses a novel capacitive touch screen FPC (flexible printed circuit) structure, which comprises a substrate and a plurality of FPC bodies arranged on the substrate, each FPC body comprises a bearing part, an extension part and a bending part which are sequentially connected, the FPC bodies on the substrate are oppositely arranged at intervals, and the extension parts of two adjacent FPC bodies are adjacently arranged. The FPC structure is provided with the U-shaped FPC bodies, so that a plurality of FPC bodies are arranged on the substrate without leaving a lot of gaps, and the effect of saving the cost is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of FPC, in particular to a novel FPC structure of a capacitive touch screen. Background Art

[0002] Flexible Printed Circuit Board (FPC) is a printed circuit board made of a flexible insulating substrate (mainly polyimide or polyester film). It has many advantages that rigid printed circuit boards do not have. For example, it can be bent, rolled, and folded freely. FPC has been widely used in aerospace, military, mobile communications, laptops, computer peripherals, PDAs, digital cameras, and other fields or products. FPC is used on capacitive touch screens to connect and communicate with the client host.

[0003] The FPC design on the capacitive touch screen in the prior art is usually set to be wide at the top and narrow at the bottom. Since there are more pins at the position where the FPC is connected to the capacitive touch screen, the size of the end of the FPC connected to the capacitive touch screen is larger. The other end of the FPC is used to connect to the client host. After passing through the external drive circuit on the FPC, it is generally connected to the main board via the I2C interface, and the PIN pins are relatively few, so that the FPC is set to be wide at the top and narrow at the bottom. However, this FPC design is to punch out small pieces of FPC that meet the specifications on a large substrate during production. According to the existing joint version method, there will be a lot of gaps between adjacent FPCs, resulting in a large amount of waste, thereby causing material waste. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a novel FPC structure of a capacitive touch screen.

[0005] The purpose of this utility model is achieved through the following technical solutions:

[0006] A novel FPC structure of a capacitive touch screen comprises: a substrate and a plurality of FPC bodies arranged on the substrate, wherein the FPC bodies comprise a bearing portion, an extension portion and a bending portion connected in sequence, the plurality of FPC bodies on the substrate are arranged opposite to each other at intervals, and the extension portions of two adjacent FPC bodies are arranged adjacent to each other.

[0007] In one embodiment, one end of the bearing portion is connected to the extension portion, the bearing portion is used to be connected to an external driving circuit, two ends of the extension portion are respectively connected to the bearing portion and the bending portion, and the bending portion is arranged parallel to the bearing portion.

[0008] In one embodiment, the extension portion and the bending portion are arranged at a certain distance from each other, and the extension portion and the bending portion are combined to form a U-shape.

[0009] In one embodiment, the plurality of FPC bodies on the substrate are divided into two rows, the bearing parts of the two rows of FPC bodies are respectively located on two sides close to the substrate, and the two rows of FPC bodies are sequentially arranged and distributed on the substrate.

[0010] In one embodiment, one end of the FPC body is a binding end and the other end is an interface pin end, the binding end is located at an end of the bearing portion away from the extension portion, and the interface pin end is located at an end of the bending portion away from the extension portion.

[0011] In one embodiment, the binding end and the interface pin end of the FPC body are used to connect to a capacitive touch screen and a client host, respectively, and the bent portion is bent downward along an end of the extending portion.

[0012] In one embodiment, a foam double-sided adhesive is provided between the bending portion and the extension portion for fixing the bending portion after the bending portion is bent, and the foam double-sided adhesive is located between the bending position of the bending portion and the end position of the extension portion.

[0013] In one embodiment, a reinforcing plate for increasing the strength of the bending portion is provided at the bending position of the bending portion, the reinforcing plate is located between the bending portion and the extending portion, and the foam double-sided adhesive is located between the reinforcing plate and the extending portion.

[0014] In one embodiment, the size of the reinforcing plate is larger than the size of the foam double-sided adhesive.

[0015] In one embodiment, the surface of the FPC body is covered with a release film for protection.

[0016] Compared with the prior art, the utility model has at least the following advantages:

[0017] The utility model discloses a novel FPC structure of a capacitive touch screen, wherein a U-shaped FPC body is provided, and a plurality of FPC bodies are arranged relatively at intervals and are sequentially arranged and distributed on a substrate, and a gap between two adjacent FPC bodies is very small so as not to cause space on the substrate, thereby saving costs, and when the two ends of the FPC body are respectively connected to the capacitive touch screen and the client host, the bent portion is bent downward so that the bent portion becomes an extension of the extended portion, thereby facilitating the upper and lower ends of the FPC body to be respectively connected to the capacitive touch screen and the client host. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments are briefly introduced below.

[0019] Figure 1 A schematic diagram of the structure of an FPC structure of a novel capacitive touch screen provided by the utility model;

[0020] Figure 2 A schematic diagram of the structure of an FPC body in an FPC structure of a novel capacitive touch screen provided by the utility model;

[0021] Figure 3 A schematic diagram of the structure of the bending portion of the FPC body in the FPC structure of a novel capacitive touch screen provided by the utility model;

[0022] Figure 4 The utility model provides a schematic diagram of the side structure of the bent portion of the FPC body in the FPC structure of a novel capacitive touch screen.

[0023] Description of the drawings: 10, substrate; 20, FPC body; 21, load-bearing part; 22, extension part; 23, bending part; 30, binding end; 40, interface pin end; 50, double-sided foam adhesive; 60, reinforcement plate. DETAILED DESCRIPTION

[0024] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings.

[0025] A new type of FPC structure of capacitive touch screen, refer to Figure 1 , including a substrate 10 and a plurality of FPC bodies 20 arranged on the substrate 10, wherein the FPC bodies 20 are arranged on the substrate 10 in a side-by-side stamping form.

[0026] Reference Figure 1 and Figure 2 The FPC body 20 includes a bearing portion 21, an extension portion 22 and a bending portion 23, and the bearing portion 21, the extension portion 22 and the bending portion 23 are connected in sequence. The bearing portion 21 is one end of the FPC body 20, and the bearing portion 21 is arranged in a rectangular shape. The bearing portion 21 is used to connect with an external driving circuit. The extension portion 22 is arranged in an L-shape, and the extension portion 22 is connected to one end of the bearing portion 21. The extension portion 22 serves to connect the bearing portion 21 and the bending portion 23. The bending portion 23 is arranged in parallel with the extension portion 22, and one end of the bending portion 23 is connected to the end of the extension portion 22 away from the bearing portion 21. The bending portion 23 is combined with the extension portion 22 to form a U-shape, and the extension portion 22 and the bending portion 23 are arranged at a certain distance.

[0027] Reference Figure 1The multiple FPC bodies 20 on the substrate 10 are divided into two rows, the two rows of FPC bodies 20 are arranged opposite to each other, the bearing parts 21 of the two rows of FPC bodies 20 are respectively located on both sides close to the substrate 10, the two rows of FPC bodies 20 are arranged on the substrate 10 at intervals, the extension parts 22 of two adjacent FPC bodies 20 are arranged adjacently, and the multiple FPC bodies 20 are arranged and distributed on the substrate 10 in sequence, and the gap between two adjacent FPC bodies 20 is very small, so as not to cause space on the substrate 10, thereby saving costs. With this arrangement of the FPC bodies 20, the FPC utilization area on the substrate 10 saves 22% of the area compared with the prior art.

[0028] Reference Figure 2 One end of the FPC body 20 is a binding end 30, and the other end is an interface pin end 40. The binding end 30 is located at the end of the bearing portion 21 away from the extension portion 22. The binding end 30 is used to bind the FPC body 20 to the capacitive touch screen. The interface pin end 40 is located at the end of the bending portion 23 away from the extension portion 22. The interface pin end 40 is used to connect to the client host.

[0029] Reference Figure 3 When the FPC body 20 needs to be connected to the capacitive touch screen and the client host, the bending portion 23 of the FPC body 20 is bent downward along the end of the extension portion 22 so that the bending portion 23 becomes an extension of the extension portion 22, thereby facilitating the upper and lower ends of the FPC body 20 to be connected to the capacitive touch screen and the client host respectively.

[0030] Reference Figure 4 After the bending portion 23 is bent, a foam double-sided adhesive 50 for pasting and fixing is provided between the bending portion 23 and the extension portion 22. The foam double-sided adhesive 50 is located between the bending position of the bending portion 23 and the end position of the extension portion 22. The foam double-sided adhesive 50 fixes the position of the bending portion 23, so that the interface pin end 40 on the bending portion 23 and the binding end 30 on the load-bearing portion 21 are respectively located at the upper and lower ends of the FPC body 20.

[0031] Further, refer to Figure 4 A reinforcing plate 60 for increasing the strength of the bending portion 23 is provided at the bending position of the bending portion 23. The reinforcing plate 60 is located at the end position of the bending portion 23 and the extension portion 22. When the bending portion 23 bends downward, the reinforcing plate 60 can support the bending portion 23 and improve the strength of the bending position of the bending portion 23. The foam double-sided adhesive 50 is located between the reinforcing plate 60 and the extension portion 22, and the size of the reinforcing plate 60 is larger than that of the foam double-sided adhesive 50.

[0032] Reference Figure 4The surface of the FPC body 20 is covered with a release film, which can protect the FPC body 20 during factory transportation and inspection to avoid damage to the FPC body 20 caused by scratches.

[0033] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A novel FPC structure of a capacitive touch screen, characterized in that: include: A substrate (10) and a plurality of FPC bodies (20) arranged on the substrate (10); the FPC body (20) comprises a bearing portion (21), an extension portion (22) and a bending portion (23) connected in sequence; the plurality of FPC bodies (20) on the substrate (10) are arranged relative to each other at intervals, and the extension portions (22) of two adjacent FPC bodies (20) are arranged adjacent to each other.

2. The FPC structure of a novel capacitive touch screen according to claim 1 is characterized in that: One end of the bearing portion (21) is connected to the extension portion (22); the bearing portion (21) is used to be connected to an external driving circuit; two ends of the extension portion (22) are respectively connected to the bearing portion (21) and the bending portion (23); the bending portion (23) and the bearing portion (21) are arranged in parallel.

3. The FPC structure of a novel capacitive touch screen according to claim 2 is characterized in that: The extension portion (22) and the bending portion (23) are arranged at a certain distance from each other, and the extension portion (22) and the bending portion (23) are combined to form a U-shape.

4. The FPC structure of a novel capacitive touch screen according to claim 3 is characterized in that: The plurality of FPC bodies (20) located on the substrate (10) are divided into two rows, the bearing parts (21) of the two rows of FPC bodies (20) are respectively located on two sides close to the substrate (10), and the two rows of FPC bodies (20) are sequentially arranged and distributed on the substrate (10).

5. The FPC structure of a novel capacitive touch screen according to claim 4 is characterized in that: One end of the FPC body (20) is a binding end (30) and the other end is an interface pin end (40); the binding end (30) is located at an end of the bearing portion (21) away from the extension portion (22); and the interface pin end (40) is located at an end of the bending portion (23) away from the extension portion (22).

6. The FPC structure of a novel capacitive touch screen according to claim 5, characterized in that: The binding end (30) and the interface pin end (40) of the FPC body (20) are used to connect to a capacitive touch screen and a client host, respectively, and the bent portion (23) is bent downward along the end of the extension portion (22).

7. The FPC structure of a novel capacitive touch screen according to claim 6, characterized in that: A foam double-sided adhesive tape (50) is provided between the bending portion (23) and the extending portion (22) for fixing the bending portion (23) after it is bent. The foam double-sided adhesive tape (50) is located between the bending position of the bending portion (23) and the end position of the extending portion (22).

8. The FPC structure of a novel capacitive touch screen according to claim 7 is characterized in that: A reinforcing plate (60) for increasing the strength of the bending portion (23) is provided at the bending position of the bending portion (23); the reinforcing plate (60) is located between the bending portion (23) and the extending portion (22); and the foam double-sided adhesive (50) is located between the reinforcing plate (60) and the extending portion (22).

9. The FPC structure of a novel capacitive touch screen according to claim 8, characterized in that: The size of the reinforcing plate (60) is larger than the size of the foam double-sided adhesive (50).

10. The FPC structure of a novel capacitive touch screen according to claim 9, characterized in that: The surface of the FPC body (20) is covered with a layer of release film for protection.

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