Reinforcing structure for preventing FPC corner from being torn
By setting a give way notch on the FPC reinforcement sheet, the problems of easy tear and appearance problems of FPC corners are solved, and the effective tear prevention and appearance quality of the FPC reinforcement sheet is achieved.
Patent Information
- Application Number
- CN202421337589.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-12
- Publication Date
- 2025-04-18
- Estimated Expiration
- 2034-06-12
AI Technical Summary
Existing FPC reinforcement sheets are prone to offset during the pressing process, resulting in the FPC corners being easily torn and may have appearance problems.
A reinforcement structure that prevents the tear of the FPC corner is designed. By setting a gift gap on the FPC reinforcement sheet, its outer edge is away from the chamfer adjacent to it, thereby preventing tear and avoiding appearance problems caused by the alignment offset.
Effectively prevents the tearing of FPC corners and avoids appearance problems caused by alignment offsets, which improves the process yield of FPC products.
Smart Images
Figure CN222776369U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of flexible circuit boards, in particular to a reinforcement structure for preventing FPC corners from tearing. Background Art
[0002] Flexible circuit board, abbreviated as FPC in English, is a printed circuit made of polyester film (PET) or polyimide (PI) as the substrate, by etching the circuit on copper foil. It is generally laminated with FPC reinforcement sheet to reinforce the structural strength of FPC. The hardness of FPC reinforcement sheet is greater than that of the substrate composed of polyester film or polyimide. Under a certain external force, the outer edge of FPC reinforcement sheet can cut the FPC substrate.
[0003] Existing FPCs are usually composed of a main body, a tail, and a neck portion connected between the main body and the tail, and the corners of the neck portion are all chamfered. Under the combined influence of the attachment tolerance and the raw material tolerance, the FPC reinforcement sheet is prone to a certain degree of deviation when it is pressed onto the main body or the tail, that is, the outer edge of the FPC reinforcement sheet extending to the neck of the FPC is prone to exceed the outer edge of the adjacent chamfer, and when the tail is subjected to external force, the neck of the FPC is prone to be torn, and there will also be appearance problems with large and small edges of the FPC reinforcement sheet due to alignment deviation. Utility Model Content
[0004] To this end, in order to solve the above-mentioned problem, the utility model provides a reinforcement structure for preventing FPC corner tearing, which can ensure that the outer edge of the FPC reinforcement sheet is away from the outer edge of the chamfer adjacent to it, thereby preventing the FPC corner from tearing, and will not cause the appearance problem of large and small edges of the FPC reinforcement sheet due to alignment offset.
[0005] To achieve the above purpose, the technical solution provided by the utility model is as follows:
[0006] The utility model provides a reinforcing structure for preventing FPC corner tearing, comprising an FPC, wherein the FPC comprises a first main body and a second main body arranged at a spacing and a connecting portion connected between the first main body and the second main body, and further comprises an FPC reinforcing sheet; the first main body and the second main body are respectively provided with corresponding chamfers at vertical connections with the connecting portion, and the first main body or the second main body is attached with the FPC reinforcing sheet; one end of the FPC reinforcing sheet extends to the chamfer area adjacent thereto; the FPC reinforcing sheet is provided with a making way notch for making way for the chamfer adjacent thereto, so that the outer edge of the FPC reinforcing sheet is away from the outer edge of the chamfer adjacent thereto, thereby forming an anti-FPC corner tearing arrangement.
[0007] Furthermore, the FPC reinforcement sheet has a connected adhesive backing area and an adhesive-free area, the adhesive backing area is adhered to one end of the first body or the second body, and the adhesive-free area extends from the other end of the adhesive backing area to the chamfer area adjacent thereto; the clearance gap is arranged in the adhesive-free area.
[0008] Furthermore, the FPC reinforcing sheet is provided with a concave step toward the chamfered corner adjacent thereto, and the step includes a short side and a long side connected thereto, and together encloses an L-shaped clearance gap.
[0009] Furthermore, the distance between the long side and the chamfer adjacent thereto is at least 0.5 mm.
[0010] Furthermore, the distance between the short side and the chamfer adjacent thereto is at least 1.0 mm.
[0011] The technical solution provided by the utility model has the following beneficial effects:
[0012] The FPC reinforcing sheet is provided with a notch for making way for the chamfer adjacent to it, so that the outer edge of the FPC reinforcing sheet is away from the outer edge of the chamfer adjacent to it, thereby ensuring that the outer edge of the FPC reinforcing sheet is away from the outer edge of the chamfer adjacent to it, that is, the outer edge of the FPC reinforcing sheet will not exceed the outer edge of the chamfer adjacent to it, thereby preventing the FPC corner from being torn, and there will be no appearance problems of large and small edges of the FPC reinforcing sheet due to alignment offset. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 Shown is a schematic diagram of a reinforcement structure for preventing FPC corner tearing in an embodiment;
[0014] Figure 2 Shown is a schematic diagram of an FPC reinforcement sheet in an embodiment;
[0015] Figure 3 The figure is a simplified schematic diagram of an FPC without a clearance gap in a normal state in the embodiment;
[0016] Figure 4 The figure is a simplified schematic diagram of an FPC without a clearance gap in an upwardly biased state in the embodiment;
[0017] Figure 5 It is a simplified schematic diagram of an FPC without a clearance gap in a downwardly biased state in an embodiment. DETAILED DESCRIPTION
[0018] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which 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 contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.
[0019] The utility model is now further described in conjunction with the accompanying drawings and specific implementation methods.
[0020] Reference Figure 1 and Figure 2 As shown, this embodiment provides a reinforcement structure for preventing FPC corner tearing (hereinafter referred to as the reinforcement structure), including an FPC, the FPC including a first body 1 and a second body 2 arranged at a distance and a connecting portion 3 connected between the first body 1 and the second body 2, and the reinforcement structure also includes Figure 2 The FPC reinforcing sheet 5 shown in the figure has corresponding chamfers 4 respectively arranged at the vertical connections between the first body 1 and the second body 2 and the connecting portion 3, the FPC reinforcing sheet 5 is attached to the second body 2, one end of the FPC reinforcing sheet 5 extends to the chamfer area adjacent thereto, and the FPC reinforcing sheet 5 is provided with a making way notch 51 for making way for the chamfer 4 adjacent thereto, so that the outer edge of the FPC reinforcing sheet 5 is away from the outer edge of the chamfer 4 adjacent thereto, thereby forming an anti-FPC corner tearing arrangement.
[0021] In this embodiment, the specific first body 1, the second body 2 and the connecting portion 3 are the body, the tail and the neck of the FPC respectively.
[0022] The FPC reinforcing sheet 5 has a connected adhesive backing area and an adhesive-free area, and the adhesive backing area is adhered to one end of the second body 2, that is, the adhesive backing area of the FPC reinforcing sheet 5 corresponds to the plug-in end of the tail of the FPC.
[0023] The other end of the non-glue area away from the back-glue area extends to the chamfered corner area 4 adjacent thereto, and the clearance notch 51 is arranged in the non-glue area.
[0024] After the FPC reinforcing sheet 5 is pressed onto the tail of the FPC, if the FPC is not provided with a clearance notch 51, only the outer edge of the FPC reinforcing sheet 5 coincides with the outer edge of the tail of the FPC. Figure 3 In addition, when the outer edge of the FPC reinforcement sheet 5 is offset upward and exceeds the outer edge of the chamfer 4 at the vertical connection between the tail and the neck of the FPC, the FPC appears as Figure 4 When the outer edge of the FPC reinforcement sheet 5 is offset downward and away from the outer edge of the tail of the FPC, the FPC appears as Figure 5 Small edge anomaly shown.
[0025] The FPC reinforcing sheet 5 is provided with a clearance notch 51 for making way for the chamfer 4 adjacent thereto, so that the outer edge of the FPC reinforcing sheet 5 is away from the outer edge of the chamfer 4 adjacent thereto, thereby ensuring that the outer edge of the FPC reinforcing sheet 5 is away from the outer edge of the chamfer 4 adjacent thereto, that is, the outer edge of the FPC reinforcing sheet 5 will not exceed the outer edge of the chamfer 4 adjacent thereto, thereby preventing the FPC corner from being torn, and there will be no appearance problems of large and small edges of the FPC reinforcing sheet 5 due to alignment offset, and the process yield of the FPC product can be improved.
[0026] Of course, in other embodiments, the first body 1 may also be attached with an FPC reinforcing sheet 5 , and the attachment positions of the FPC reinforcing sheet 5 are interchangeable, which will not be described in detail here.
[0027] In another preferred embodiment, Figure 2 As shown, the FPC reinforcing sheet 5 is provided with a concave step at the corner facing the adjacent chamfer 4, and the step includes a short side 52 and a long side 53 connected to each other, and together form an L-shaped clearance gap 51, so as to provide sufficient clearance space for the position offset formed during the subsequent alignment and pressing of the FPC reinforcing sheet 5.
[0028] Further preferably, Figure 1 As shown, the distance L2 between the long side 53 and the adjacent chamfer 4 is at least 0.5 mm to ensure that the long side 53 does not exceed the outer edge of the adjacent chamfer 4 when offset in the upward and downward directions.
[0029] Further preferably, Figure 1 As shown, the distance L1 between the short side 52 and the adjacent chamfer 4 is at least 1.0 mm to ensure that the short side 52 does not exceed the outer edge of the adjacent chamfer 4 when offset in the left or right direction.
[0030] Although the present invention has been specifically demonstrated and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes may be made to the present invention in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims, all of which are within the scope of protection of the present invention.
Claims
1. A reinforcement structure for preventing FPC corner tearing, comprising an FPC, wherein the FPC comprises a first body and a second body arranged at a distance and a connecting portion connected between the first body and the second body, characterized in that: It also includes FPC reinforcement sheets; The vertical connections between the first body and the second body and the connecting portion are respectively provided with corresponding chamfers, and the first body or the second body is attached with the FPC reinforcing sheet; One end of the FPC reinforcing sheet extends to the chamfer area adjacent thereto; the FPC reinforcing sheet is provided with a clearance notch for making way for the chamfer adjacent thereto, so that the outer edge of the FPC reinforcing sheet is away from the outer edge of the chamfer adjacent thereto, thereby forming an anti-FPC corner tearing arrangement.
2. The reinforcing structure for preventing FPC corner tearing according to claim 1, characterized in that: The FPC reinforcing sheet has a connected adhesive backing area and an adhesive-free area, the adhesive backing area is adhered to one end of the first body or the second body, and the adhesive-free area extends from the other end of the adhesive backing area to the chamfer area adjacent thereto; the clearance notch is arranged in the adhesive-free area.
3. The reinforcing structure for preventing FPC corner tearing according to claim 1 or 2, characterized in that: The FPC reinforcing sheet is provided with a concave step at a corner facing the chamfer adjacent thereto, and the step includes a short side and a long side connected thereto, and together they enclose an L-shaped clearance gap.
4. The reinforcing structure for preventing FPC corner tearing according to claim 3, characterized in that: The distance between the long side and the chamfer adjacent thereto is at least 0.5 mm.
5. The reinforcing structure for preventing FPC corner tearing according to claim 3, characterized in that: The distance between the short side and the chamfer adjacent thereto is at least 1.0 mm.