High-precision impedance flexible circuit board

Abstract

The utility model provides a high-precision impedance flexible circuit board, which comprises a flexible circuit board, a conductive pattern is printed on the front surface of the flexible circuit board, one end of the flexible circuit board is provided with a connecting part, the other end of the flexible circuit board is provided with a connector, the bottom of the flexible circuit board is fixedly connected with a soft layer, and the flexible layer is provided with a conductive layer. The soft layer is of a hollow structure. The flexible circuit board has the advantages that the wedge-shaped block is provided with the two inclined planes, the flexible circuit board is bent towards the front surface of the wedge-shaped block, the flexible layer and the reinforcing plate are both bent during bending, and when the side surface of the reinforcing plate abuts against one side surface of the wedge-shaped block, the reinforcing plate and the flexible layer cannot be continuously bent; therefore, the flexible circuit board cannot be continuously bent after reaching a certain angle at the pre-bending point, and the overall structural strength of the flexible circuit board is improved by using the mode of matching the soft layer with the reinforcing plate, so that the flexible circuit board is prevented from being excessively bent, a circuit on the flexible circuit board is prevented from being damaged and broken, and the service life of the flexible circuit board is ensured.

Description

Technical Field

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

[0002] Flexible circuit boards are generally used in closed spaces such as mobile phones and tablet computers. Especially when used in notebooks or flip phones, they need to be flipped frequently. Therefore, high strength and flexibility are required for FPC.

[0003] The utility model patent with announcement number CN210519002U proposes an FPC flexible circuit board with a double-layer connection structure, including a first flexible circuit board and a second flexible circuit board, the first flexible circuit board is fixedly connected to the right side of the upper surface and the lower surface of the first flexible circuit board with a T-shaped reinforcement sheet, the right side of the upper surface of the first flexible circuit board is fixedly connected to multiple groups of contact disks, the right front side and the right rear side of the upper surface of the first flexible circuit board are provided with positioning holes, the right side of the top of the first flexible circuit board is sleeved with a connection block, the interior of the connection block is provided with a connection groove, the middle part of the upper surface of the connection block is provided with a fixing hole, and the interior of the fixing hole is vertically provided with a fixing screw, the right side of the top of the first flexible circuit board is fixedly connected to the connection block by a fixing screw, the left side of the lower surface of the first flexible circuit board and the left side of the upper surface of the second flexible circuit board are fixedly connected with an arc-shaped reinforcement sheet, the left side of the bottom of the first flexible circuit board is sleeved with a clamping frame, the left side of the top of the second flexible circuit board is fixedly connected with a clamping block, and the upper and lower surfaces of the right side of the second flexible circuit board are fixedly connected with mounting disks.

[0004] The bending angle of the above-mentioned flexible circuit board cannot be controlled during use. When a part of the flexible circuit board is excessively bent, it is easy to cause the circuit to be damaged and broken, thus affecting the service life of the flexible circuit board. Utility Model Content

[0005] The purpose of the present invention is to solve at least one of the above technical deficiencies.

[0006] Therefore, one purpose of the present invention is to provide a high-precision impedance flexible circuit board to solve the problems mentioned in the background technology and overcome the deficiencies in the prior art.

[0007] In order to achieve the above-mentioned object, an embodiment of one aspect of the utility model provides a high-precision impedance flexible circuit board, comprising a flexible circuit board, a conductive pattern is printed on the front of the flexible circuit board, a connecting portion is provided at one end of the flexible circuit board, and a connector is provided at the other end of the flexible circuit board;

[0008] A soft layer is fixedly connected to the bottom of the flexible circuit board, the soft layer is a hollow structure, and a reinforcing plate is fixedly connected to the inside of the soft layer;

[0009] A wedge block is fixedly connected to the middle of the soft layer, and the tip of the wedge block is fixedly connected to the midpoint of the reinforcing plate.

[0010] Preferably, any of the above schemes is that the substrate material of the flexible circuit board is polyimide, and pre-bending points are arranged on the flexible circuit board.

[0011] Adopting the above technical solution: In this flexible circuit board, the conductive pattern is the path for the flow of current, which is responsible for transmitting the electrical signals between electronic components. When the current needs to flow from one electronic component to another, it will flow along the pre-designed circuit pattern. These circuit patterns are formed by conductive patterns, and the conductive patterns are isolated by insulating materials.

[0012] In this way, the flexible circuit board can complete electronic functions such as work, amplification, attenuation, modulation, demodulation, encoding, etc., to achieve the normal operation of electronic equipment.

[0013] Preferably, any of the above solutions is that the conductive pattern on the flexible circuit board is made of copper foil or aluminum foil.

[0014] Preferably, any of the above solutions is that the material of the soft layer is resin, and the soft layer is bonded to the bottom of the flexible circuit board.

[0015] The above technical solution is adopted: the core structure of the flexible circuit board is: a soft layer, a reinforcing plate, and a wedge block. The core advantages of the flexible circuit board are: a soft layer is connected below the pre-bending point of the flexible circuit board, and the wedge block and the reinforcing plate are fixedly connected inside the soft layer. The wedge block has two inclined surfaces, and the flexible circuit board is bent toward its front. When bending, both the soft layer and the reinforcing plate are bent. When the side of the reinforcing plate abuts against one side of the wedge block, the reinforcing plate and the soft layer cannot continue to bend, so that the flexible circuit board cannot continue to bend after reaching a certain angle at the pre-bending point. The use of a soft layer in combination with a reinforcing plate improves the overall structural strength of the flexible circuit board, thereby preventing it from being excessively bent, thereby preventing the circuit thereon from being damaged and broken, and thus ensuring the service life of the flexible circuit board.

[0016] Preferably, in any of the above schemes, the soft layer is located at the pre-bending point of the flexible circuit board, and the reinforcing plate is made of metal.

[0017] Preferably, according to any of the above schemes, the tip of the wedge-shaped block faces downward.

[0018] Compared with the prior art, the advantages and beneficial effects of the utility model are:

[0019] The high-precision impedance flexible circuit board is configured by the coordination of a soft layer, a reinforcing plate, and a wedge block. A soft layer is connected below the pre-bending point of the flexible circuit board. The inside of the soft layer is fixedly connected to the wedge block and the reinforcing plate. The wedge block has two inclined surfaces. The flexible circuit board bends toward the front thereof. When bending, both the soft layer and the reinforcing plate are bent. When the side surface of the reinforcing plate abuts against one side surface of the wedge block, the reinforcing plate and the soft layer cannot continue to bend. Thus, the flexible circuit board cannot continue to bend after reaching a certain angle at the pre-bending point. The use of the soft layer in coordination with the reinforcing plate improves the overall structural strength of the flexible circuit board, thereby preventing it from being excessively bent, thereby preventing the circuit thereon from being damaged or broken, and thereby ensuring the service life of the flexible circuit board.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 It is a structural schematic diagram of the utility model from the first perspective;

[0023] Figure 2 It is a structural schematic diagram of the utility model from a second viewing angle;

[0024] Figure 3 It is a schematic diagram of the top view structure of the utility model;

[0025] Figure 4 It is a schematic diagram of the partial cross-sectional structure of the soft layer of the utility model.

[0026] In the figure: 1-flexible circuit board, 2-connecting part, 3-connector, 4-soft layer, 5-reinforcement plate, 6-wedge block, 7-conducting hole, 8-pre-bending point. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] like Figure 1-4 As shown, the high-precision impedance flexible circuit board includes a flexible circuit board 1, a conductive pattern is printed on the front of the flexible circuit board 1, a connecting portion 2 is provided at one end of the flexible circuit board 1, and a connector 3 is provided at the other end of the flexible circuit board 1;

[0030] The bottom of the flexible circuit board 1 is fixedly connected with a soft layer 4, the soft layer 4 is a hollow structure, and the inside of the soft layer 4 is fixedly connected with a reinforcing plate 5;

[0031] A wedge block 6 is fixedly connected to the middle of the soft layer 4 , and the tip of the wedge block 6 is fixedly connected to the midpoint of the reinforcing plate 5 .

[0032] Embodiment 1: The substrate material of the flexible circuit board 1 is polyimide, and a pre-bending point is set on the flexible circuit board 1. The conductive pattern material on the flexible circuit board 1 is copper foil or aluminum foil. The material of the soft layer 4 is resin, and the soft layer 4 is bonded to the bottom of the flexible circuit board 1.

[0033] Embodiment 2: The soft layer 4 is located at the pre-bending point of the flexible circuit board 1, and the reinforcing plate 5 is made of metal. The tip of the wedge block 6 faces downward.

[0034] The working principle of the utility model is as follows:

[0035] In this flexible circuit board, the conductive pattern is the path for the flow of current. It is responsible for transmitting electrical signals between electronic components. When the current needs to flow from one electronic component to another, it will flow along the pre-designed circuit pattern. These circuit patterns are formed by conductive patterns, and the conductive patterns are isolated by insulating materials.

[0036] In this way, the flexible circuit board can complete electronic functions such as work, amplification, attenuation, modulation, demodulation, encoding, etc., to achieve the normal operation of electronic equipment;

[0037] The connecting portion 2 and the connector 3 are used to connect to other docking structures.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] The high-precision impedance flexible circuit board is configured by the coordination of a soft layer 4, a reinforcing plate 5, and a wedge block 6. A soft layer 4 is connected below the pre-bending point of the flexible circuit board 1. The wedge block 6 and the reinforcing plate 5 are fixedly connected inside the soft layer 4. The wedge block 6 has two inclined surfaces. The flexible circuit board 1 is bent toward its front side. When bending, both the soft layer 4 and the reinforcing plate 5 are bent. When the side surface of the reinforcing plate 5 abuts against one side surface of the wedge block 6, the reinforcing plate 5 and the soft layer 4 cannot continue to bend, so that the flexible circuit board 1 cannot continue to bend after reaching a certain angle at the pre-bending point. The use of the soft layer 4 in coordination with the reinforcing plate 5 improves the overall structural strength of the flexible circuit board 1, thereby preventing it from being excessively bent, thereby preventing the circuit thereon from being damaged and broken, and thus ensuring the service life of the flexible circuit board 1.

Claims

1. A high-precision impedance flexible circuit board, characterized in that: It comprises a flexible circuit board (1), a conductive pattern is printed on the front side of the flexible circuit board (1), a connecting portion (2) is arranged at one end of the flexible circuit board (1), and a connector (3) is arranged at the other end of the flexible circuit board (1); The bottom of the flexible circuit board (1) is fixedly connected to a soft layer (4), the soft layer (4) is a hollow structure, and the interior of the soft layer (4) is fixedly connected to a reinforcing plate (5); A wedge block (6) is fixedly connected to the middle of the soft layer (4), and the tip of the wedge block (6) is fixedly connected to the midpoint of the reinforcing plate (5).

2. A high-precision impedance flexible circuit board as claimed in claim 1, characterized in that: The substrate material of the flexible circuit board (1) is polyimide, and pre-bending points are arranged on the flexible circuit board (1).

3. A high-precision impedance flexible circuit board as claimed in claim 2, characterized in that: The conductive pattern on the flexible circuit board (1) is made of copper foil or aluminum foil.

4. A high-precision impedance flexible circuit board as claimed in claim 3, characterized in that: The material of the soft layer (4) is resin, and the soft layer (4) is bonded to the bottom of the flexible circuit board (1).

5. A high-precision impedance flexible circuit board as claimed in claim 4, characterized in that: The soft layer (4) is located at the pre-bending point of the flexible circuit board (1), and the reinforcing plate (5) is made of metal.

6. A high-precision impedance flexible circuit board as claimed in claim 5, characterized in that: The tip of the wedge-shaped block (6) faces downward.

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