CN-122026140-A - High-reliability binding structure for thin film touch sensor and flexible flat cable

Abstract

The invention discloses a high-reliability binding structure of a film touch sensor and a flexible flat cable, which comprises a touch film substrate and a cover plate, wherein the touch film substrate and one side of the cover plate are in dispensing arrangement with an FPC flat cable, the binding point area of the touch film substrate and the FPC flat cable is widened at the left side and the right side, so that the adhesive contact surface of the FPC flat cable and the cover plate is enlarged, the FPC flat cable is additionally fixed by the cover plate, a PIN needle at the right side of the FPC flat cable is in contact connection with a PIN needle at the widened area at the right side on the touch film substrate, the binding point PIN width is optimized by optimizing the binding position and the fixing scheme of the small FPC flat cable and the touch film substrate, the problem that the failure phenomenon occurs to the binding point due to stress is solved, the procedure of fixing the FPC with additional glue after the cover plate is adhered is eliminated, the product quality is improved, and the production cost is reduced.

Inventors

• LIU HUA
• WANG FULI

Assignees

• 江苏天宝汽车电子有限公司

Dates

Publication Date

20260512

Application Date

20260109

Claims (4)

1. 1. A high-reliability film touch sensor and flexible flat cable binding structure is characterized by comprising a touch film substrate (1) and a cover plate (2), wherein one side of the touch film substrate (1) and one side of the cover plate (2) are in adhesive dispensing with each other to form an FPC flat cable (3), a binding point area (5) of the touch film substrate (1) and the FPC flat cable (3) is widened and arranged at the left side and the right side, an adhesive contact surface of the FPC flat cable (3) and the cover plate (2) is increased, the cover plate (2) is increased to fix the FPC flat cable (3), a PIN needle at the right side of the FPC flat cable (3) is in contact connection with a PIN needle at the right side widened area on the touch film substrate (1), an extension flat cable at the left side of the FPC flat cable (3) extends out of the touch film substrate (1) and the cover plate (2) to form an overlapping area, a release slot (4) is formed in the left side of the PIN needle of the touch film substrate (1) and faces the FPC flat cable (3) to be protruded, the release slot (4) faces the direction of the FPC flat cable (3), the release slot (3) is fixed, and the stress difference is generated between the release slot (4) and the FPC flat cable (3) and the touch film substrate (1) is fixed.
2. 2. The high-reliability binding structure of the thin film touch sensor and the flexible flat cable according to claim 1, wherein the surface of the cover section of the touch film substrate (1) contacted with the cover plate (2) of the FPC flat cable (3) is adhered with the cover plate (2) by glue, and the FPC flat cable (3) is pre-fixed on the cover plate (2) by the glue.
3. 3. The high-reliability binding structure of the thin film touch sensor and the flexible flat cable according to claim 1 is characterized in that the contact surface of the touch film substrate (1) and the cover plate (2) is avoided, the contact overlapping area of the FPC and the touch film substrate (1) is adhered by using OCA adhesive, the cover plate (2) is adhered to the touch film substrate (1) by using the OCA adhesive to serve as auxiliary fixation of the FPC, and stress is prevented from being transmitted to a PIN needle binding point.
4. 4. The high-reliability binding structure of the thin film touch sensor and the flexible flat cable according to claim 1 is characterized in that a PIN needle connecting area of the touch film substrate (1) is widened, so that the contact area of binding points of the PIN needles of the FPC flat cable (3) and the PIN needles of the touch film substrate (1) is increased, and the reliability of conductive connection is improved.

Description

High-reliability binding structure for thin film touch sensor and flexible flat cable Technical Field The invention relates to the technical field of touch screen flat cables, in particular to a high-reliability thin film touch sensor and a flexible flat cable binding structure. Background The design is a TOUCH-sensitive FILM assembly of the TOUCH FILM, which is a part adhered on a cover plate (LENS)/panel through OCA/pressure-sensitive adhesive to provide a TOUCH function. The problem that the open circuit/short circuit/contact function of the binding area is unstable due to the stress of the FPC flat cable easily occurs in the binding area of the external FPC flat cable of the TOUCH FILM and the TOUCH FILM body base material, so that customer complaints and after-sale claims are caused. Under the prior art scheme, after TOUCH FILM is pasted, the FPC winding displacement root needs to be additionally fixed with the aid of fixing glue, and the problem that the binding area is affected due to the fact that an assembly process/finished product is pulled is avoided. For this reason, it is required to provide a high-reliability thin film touch sensor and a flexible flat cable binding structure. Disclosure of Invention Aiming at the problems in the prior art, the invention provides a high-reliability binding structure of a thin film touch sensor and a flexible flat cable, which aims to optimize the PIN width of a binding point by optimizing the binding point and the fixing scheme of a small FPC flat cable and a touch film substrate, solve the problem that the binding point is stressed to have the failure phenomenon, cancel the procedure of fixing the FPC with additional glue after being attached to a cover plate, improve the product quality and reduce the production cost. In order to achieve the purpose, the high-reliability thin film touch sensor and flexible flat cable binding structure comprises a touch film substrate and a cover plate, wherein the touch film substrate and one side of the cover plate are in point bonding with an FPC flat cable, binding point areas of the touch film substrate and the FPC flat cable are widened on the left side and the right side, the adhesive contact surface of the FPC flat cable and the cover plate is enlarged to increase the cover plate to fix the FPC flat cable, PIN needles on the right side of the FPC flat cable are in contact connection with PIN needles on the widened area on the right side of the touch film substrate, the extending flat cable on the left side of the FPC flat cable extends out of a superposition area of the touch film substrate and the cover plate, the touch film substrate is provided with a release groove on the left side of the PIN needles of the FPC flat cable, the release groove protrudes towards the direction of the FPC flat cable, the release groove is in point bonding with the contact area of the FPC flat cable, the release groove is in point bonding connection with the FPC flat cable, and the effect of releasing height difference is generated stress, and the FPC flat cable is fixed to be in conductive connection with the touch film substrate. Preferably, the surface of the section of the FPC wire covered by the touch film substrate, which is contacted with the cover plate, is adhered with the cover plate, and the FPC wire is pre-fixed on the cover plate. Preferably, the contact surface of the touch film substrate and the cover plate is adhered by using an OCA adhesive to avoid the overlapping area of the contact of the FPC and the touch film substrate, and the cover plate is fixed by using the OCA adhesive to contact the touch film substrate as the auxiliary of the FPC, so that the stress is prevented from being transferred to the PIN needle binding point. Preferably, the PIN needle connecting area of the touch film substrate is widened, so that the contact area of binding points of the FPC flat cable PIN needle and the touch film substrate PIN needle is increased, and the reliability of conductive connection is improved. In summary, the invention provides a high-reliability binding structure of a thin film touch sensor and a flexible flat cable, which solves the problem that the binding point is stressed and has the failure phenomenon by optimizing the binding point and the fixing scheme of a small FPC flat cable and a touch film substrate and optimizing the PIN width of the binding point, and eliminates the procedure of fixing the FPC with additional glue after being attached to a cover plate, thereby improving the product quality and reducing the production cost. Drawings FIG. 1 is a schematic diagram of the front view of a touch film substrate and FPC bus bar assembly of the present invention; FIG. 2 is a schematic diagram of a rear view of a touch film substrate and FPC bus bar mounted in accordance with the present invention; FIG. 3 is a schematic bottom view of the touch film substrate and FPC bus bar assembly of the present invention; FIG.