Flexible circuit board

Abstract

The utility model discloses a flexible printed circuit (FPC), which is characterized in that a copper foil and a nickel sheet on a flexible printed circuit (FPC) structure are connected in a riveting manner, a bulge and a wedge-shaped claw sheet are arranged on the nickel sheet, and the wedge-shaped claw sheet is curled inwards to extrude the copper foil needing to be fixed in a groove on the bulge, so that stable connection is realized. The step of welding the nickel sheet and the copper foil together through baking in a furnace is omitted, the steps of the processing technology are simplified, and the connection between the nickel sheet and the copper foil is more stable; and meanwhile, the model selection of the insulating film material used on the copper foil is more flexible, and the production cost can be further reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of flexible circuit boards, in particular to a flexible circuit board. Background Art

[0002] Flexible Printed Circuit Board, also known as "FPC flexible circuit board", is a printed circuit made of a flexible insulating substrate, which has many advantages that rigid printed circuit boards do not have. At present, the edges of existing FPC flexible circuit boards are welded with exposed nickel sheets. The nickel sheets on the FPC are made by applying solder paste at the welding position, heating and curing in a reflow oven, and welding them together with copper foil. After soldering, they need to be sealed with VU glue. The above method is the manufacture of FPC under conventional technical means. From the above introduction, it can be understood that the manufacturing process of conventional FPC is relatively cumbersome, which will increase the cost of the manufacturing process. In addition, the temperature in the reflow oven is about 200 degrees, which exceeds the tolerance temperature of most insulating film materials, limiting the model selection of insulating film on the FPC, further increasing the cost. Utility Model Content

[0003] The technical problem solved by the utility model is to provide a flexible circuit board which is simple to process and low in cost.

[0004] In order to solve the above technical problems, a technical solution adopted by the utility model is:

[0005] A flexible circuit board comprises: a copper foil and a nickel sheet, wherein the copper foil and the nickel sheet are fixedly connected by riveting.

[0006] Preferably, a protrusion is provided on one end of the nickel sheet, and wedge-shaped claws are provided on both sides of the protrusion;

[0007] Preferably, the protrusion is provided with a groove, and the groove corresponds to the wedge-shaped claw piece;

[0008] Preferably, holes are reserved on the copper foil corresponding to the wedge-shaped claws, and the copper foil is sleeved on the wedge-shaped claws corresponding to the nickel sheet through the holes, and the copper foil is squeezed and fixed in the groove on the protrusion by the wedge-shaped claws curling inwards;

[0009] Preferably, the flexible circuit board further comprises an insulating film, and the insulating film is bonded to the copper foil;

[0010] Preferably, the insulating film is provided with holes at the same positions as those on the copper foil.

[0011] The beneficial effects of the utility model are:

[0012] The flexible circuit board provided by the utility model connects the copper foil and the nickel sheet on the flexible circuit board FPC structure by riveting. Compared with the conventional process, the step of welding the nickel sheet and the copper foil together by baking in a furnace is eliminated, the steps of the processing process are simplified, the processing is simpler, and the quality of the product is guaranteed; at the same time, the model selection of the insulating film material used on the copper foil is more flexible, which can further reduce the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional structural schematic diagram of a flexible circuit board of the utility model;

[0014] Figure 2 is a schematic diagram of a flexible circuit board from another angle;

[0015] Figure 3 It is a schematic diagram of the structure of the fixing part on the nickel sheet in a flexible circuit board;

[0016] Figure 4 is a schematic diagram of the unfolded state of the wedge-shaped claw piece on the fixing part;

[0017] Figure 5 is a schematic diagram of a state in which the wedge-shaped claw piece on the fixing portion is rolled inward;

[0018] Figure 6 Schematic diagram of the structure of copper foil on a flexible circuit board;

[0019] The markings of the components in the accompanying drawings are as follows:

[0020] 1. Copper foil; 11. Hole position; 2. Nickel sheet; 3. Protrusion; 31. Wedge-shaped claw; 32. Groove; 4. Insulating film. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0022] Example:

[0023] This embodiment introduces the structure of a flexible circuit board.

[0024] like Figure 1 , 2 As shown, Figure 1 This is a three-dimensional structural schematic diagram of a flexible circuit board of the utility model. Figure 2 It is a schematic diagram of a flexible circuit board from another angle.

[0025] A flexible circuit board comprises: a copper foil 1 and a nickel sheet 2, wherein the copper foil 1 and the nickel sheet 2 are fixedly connected by riveting.

[0026] like Figure 3 , 4 ,5, Figure 3 Schematic diagram of the structure of the fixed part on the nickel sheet in a flexible circuit board. Figure 4 Schematic diagram of the unfolded state of the wedge-shaped claw piece on the fixing part shown. Figure 5 The figure is a schematic diagram of the state in which the wedge-shaped claw piece on the fixing part is rolled inward. A protrusion 3 is provided on one end of the nickel sheet 2, and wedge-shaped claw pieces 31 are provided on both sides of the protrusion 3. A groove 32 is provided on the protrusion 3, and the groove 32 corresponds to the wedge-shaped claw piece 31.

[0027] like Figure 6 As shown, Figure 6 1 is a schematic diagram of the structure of a copper foil on a flexible circuit board. A hole 11 is reserved on the copper foil 1 corresponding to the wedge-shaped claw piece 31.

[0028] The copper foil 1 is sleeved on the wedge-shaped claw piece 31 corresponding to the nickel sheet 2 through the hole 11; the flexible circuit board also includes an insulating film 4, which is attached to the copper foil 1; the insulating film 4 is provided with the same hole 11 as that on the copper foil 1. The copper foil is pressed and fixed in the groove on the protrusion by curling the wedge-shaped claw piece 31 inward, and the nickel sheet and the copper foil are riveted together. This method does not need to add other fixing steps, and makes the connection between the two more stable.

[0029] Through the above introduction, the utility model connects the copper foil and the nickel sheet on the flexible circuit board FPC structure by riveting, and by setting a protrusion and a wedge-shaped claw on the nickel sheet, the wedge-shaped claw curls inward to squeeze the copper foil to be fixed into the groove on the protrusion to achieve a stable connection. Compared with the conventional process, the step of welding the nickel sheet and the copper foil together by baking in the furnace is eliminated, the steps of the processing process are simplified, and the cost is reduced; at the same time, because the insulating material used no longer needs to be baked at high temperature, the model selection of the insulating film material used on the copper foil is more flexible, which can further reduce the production cost. Under this processing method, after the FPC structure is processed, the quality is still reliable and stable.

[0030] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A flexible circuit board, characterized in that: include: Copper foil (1) and nickel sheet (2), wherein the copper foil (1) and the nickel sheet (2) are fixedly connected by riveting; A protrusion (3) is arranged on one end of the nickel sheet (2), and wedge-shaped claws (31) are arranged on both sides of the protrusion (3).

2. A flexible circuit board according to claim 1, characterized in that: The protrusion (3) is provided with a groove (32), and the groove (32) corresponds to the wedge-shaped claw piece (31).

3. A flexible circuit board according to claim 2, characterized in that: A hole position (11) is reserved on the copper foil (1) corresponding to the wedge-shaped claw piece (31); the copper foil (1) is sleeved on the corresponding wedge-shaped claw piece (31) through the hole position (11); the wedge-shaped claw piece (31) is curled inwardly to form the copper foil (1), so that the copper foil (1) is squeezed and fixed in the groove (32) on the protrusion (3).

4. A flexible circuit board according to claim 3, characterized in that: It also includes an insulating film (4), the insulating film (4) and the copper foil (1).

5. A flexible circuit board according to claim 4, characterized in that: Holes (11) corresponding to the insulating film (4) are provided on the insulating film (4).

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