A connection point structure of an FPC

Abstract

The utility model discloses a kind of connection point structures of FPC, including FPC female plate, FPC female plate includes at least 1 FPC monomer and the invalid area surrounding FPC monomer, FPC monomer has recess located its outer edge and the anti-tear part being set with recess at interval, the invalid area is close to the outer edge of FPC monomer and has the connecting convex part matched recess, connecting convex part is inserted in corresponding recess, and is connected to the groove edge of recess, to form the connection point that can be torn, so it can guarantee that FPC monomer does not appear local tearing when separating and quality meets customer requirement.

Description

Technical Field

[0001] This utility model relates to the field of flexible circuit board manufacturing technology, and in particular to a connection point structure for FPC. Background Technology

[0002] Flexible printed circuit (FPC), also known as flexible circuit board or flexible circuit board, is a type of printed circuit board with high reliability and excellent flexibility, made of polyimide or polyester film as the substrate.

[0003] Currently, FPC motherboards contain multiple FPC units arranged at intervals. Generally, the FPC motherboard is punched according to a certain pattern to form an invalid area, multiple FPC units, and multiple connection points located between the invalid area and the FPC units. Then, the FPC units are separated from the invalid area by tearing off each connection point. However, when separating FPC units, stress concentration can easily cause local tearing of the FPC units at the connection points. This not only affects the appearance of the FPC but may also damage its internal circuitry. Utility Model Content

[0004] To address the aforementioned problems, this invention provides a connection point structure for FPC that ensures no local tearing occurs during FPC monomer separation and meets customer quality requirements.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0006] This utility model provides a connection point structure for an FPC, including an FPC motherboard. The FPC motherboard includes at least one FPC unit and an invalid area surrounding the FPC unit. The FPC unit has a groove located on its outer edge and a tear-resistant portion spaced apart from the groove. The invalid area has a connecting protrusion that mates with the groove near the outer edge of the FPC unit. The connecting protrusion is inserted into the corresponding groove and connected to the groove edge to form a tearable connection point.

[0007] Furthermore, the tear-resistant part is made of tear-resistant copper.

[0008] Furthermore, the tear-resistant portion extends along the edge of the groove, and the shape of the tear-resistant portion matches the bottom of the groove.

[0009] Furthermore, the line width of the tear-resistant part is 0.2 mm.

[0010] Furthermore, the tear-resistant part and the groove edge are 0.05mm apart.

[0011] Furthermore, the groove is in the shape of an isosceles trapezoid.

[0012] Furthermore, the groove opening width is 1.2mm.

[0013] Furthermore, the angle between the waist edge of the groove and the outer edge of the FPC monomer is 45 degrees.

[0014] The technical solution provided by this utility model has the following beneficial effects:

[0015] The groove, the connecting protrusion, and the tear-resistant part work together to form a tearable connection point. When the user removes or tears off the FPC unit from the FPC motherboard, it can be ensured that the FPC unit itself will not have abnormalities such as protrusions or local tears on its outer edge. Therefore, this utility model has the advantages of reasonable structure, stability and practicality, and product reliability. Attached Figure Description

[0016] Figure 1 The diagram shown is a schematic of the connection point structure of the FPC in the embodiment.

[0017] Figure 2 As shown Figure 1 Enlarged view of area A in the middle;

[0018] Figure 3 As shown Figure 1 Overlay composition of BB in the middle. Detailed Implementation

[0019] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. The components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0020] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0021] Reference Figures 1 to 3 This embodiment provides a connection point structure for an FPC, including an FPC motherboard 1. The FPC motherboard 1 includes a plurality of FPC units 12 and an invalid region 11 surrounding the FPC units 12. Of course, in other embodiments, the number of FPC units 12 may also be one.

[0022] Each FPC unit 12 has multiple grooves 121 located on its outer edge and multiple anti-tear portions 122 arranged at intervals with the corresponding grooves 121. The ineffective area 11 near the outer edge of the FPC unit 12 has multiple connecting protrusions 111 that mate with the grooves 121.

[0023] Each connecting protrusion 111 is inserted into its corresponding groove 121 and connected to the groove edge of its corresponding groove 121 to form a tearable connection point 2.

[0024] In this embodiment, the FPC motherboard 1 is composed of at least a substrate layer, a circuit layer and a cover film layer. The tear-resistant part 122 is tear-resistant copper, and both the tear-resistant copper and the circuit layer are made of copper foil.

[0025] The groove 121 is an isosceles trapezoid. After each FPC unit 12 is torn off from the FPC motherboard 1, it ensures that the break between each connecting protrusion 111 and the groove edge of the groove 121 is located inside the groove 121, so that there will be no appearance or dimensional defects such as protrusions protruding from the outer edge of the FPC unit 12.

[0026] The tear-resistant part 122 extends along the groove edge of the groove 121, and the shape of the tear-resistant part 122 matches the bottom of the groove 121 to enhance the mechanical strength of the connection point 2. Therefore, when the user tears off the FPC unit 12 later, the crack between the connecting protrusion 111 and the groove edge of the groove 121 can be effectively prevented from extending to the circuit layer of the FPC unit 12, thereby ensuring the normal function of the FPC product.

[0027] In specific implementation, the connecting protrusion 111 is formed by punching under the preset die. At this time, only a small part of the top of the connecting protrusion 111 is connected to the center of the bottom of the groove 121, so as to ensure that each FPC unit 12 is still supported by the ineffective area 11 of the FPC mother plate 1, and the shapes of each connecting protrusion 111 and the corresponding groove 121 are consistent.

[0028] like Figure 2 As shown, the line width L1 of the tear-resistant part 122 is 0.2mm, the distance L2 between the tear-resistant part 122 and the groove edge of the groove 121 is 0.05mm, the groove opening width L3 of the groove 121 is 1.2mm, and the included angle β between the waist edge of the groove 121 and the outer edge of the FPC monomer 12 is 45 degrees, so as to further ensure the quality of the FPC monomer 12 after it is torn off.

[0029] The groove 121, the connecting protrusion 111, and the tear-resistant part 122 work together to form a tearable connection point 2. When the user removes or tears off the FPC unit 12 from the FPC motherboard 1, it can be ensured that the FPC unit 12 itself will not have abnormalities such as protrusions or local tears on its outer edge. Therefore, this utility model has the advantages of reasonable structure, stability and practicality, and reliable product.

[0030] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. A connection point structure for an FPC, comprising an FPC motherboard, the FPC motherboard including at least one FPC unit and an inactive region surrounding the FPC unit, characterized in that: The FPC monomer has a groove located on its outer edge and a tear-resistant portion spaced apart from the groove. The ineffective area near the outer edge of the FPC monomer has a connecting protrusion that matches the groove. The connecting protrusion is inserted into the corresponding groove and connected to the groove edge to form a tearable connection point.

2. The connection point structure of the FPC according to claim 1, characterized in that: The tear-resistant part is made of tear-resistant copper.

3. The connection point structure of the FPC according to claim 2, characterized in that: The tear-resistant part extends along the edge of the groove, and the shape of the tear-resistant part matches the bottom of the groove.

4. The connection point structure of the FPC according to any one of claims 1-3, characterized in that: The tear-resistant part has a line width of 0.2 mm.

5. The connection point structure of the FPC according to claim 4, characterized in that: The tear-resistant part and the groove edge are 0.05mm apart.

6. The connection point structure of the FPC according to any one of claims 1-3, characterized in that: The groove is in the shape of an isosceles trapezoid.

7. The connection point structure of the FPC according to claim 6, characterized in that: The groove has a width of 1.2 mm.

8. The connection point structure of the FPC according to claim 7, characterized in that: The angle between the waist edge of the groove and the outer edge of the FPC unit is 45 degrees.

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