Flexible-flex-resistant rigid-flex circuit board

Abstract

The utility model discloses a flex-resistant rigid-flex circuit board, which comprises a first rigid circuit board and a second rigid circuit board, an elastic limit frame is sleeved outside the first rigid circuit board and the second rigid circuit board, and a flexible circuit board body is arranged between the first rigid circuit board and the second rigid circuit board. Insulation sleeves are fixedly arranged at the positions, close to the four corners, of the first hard circuit board and the second hard circuit board, the tops and the bottoms of the insulation sleeves are fixedly connected with limiting pipes and limiting rods respectively, the limiting pipes and the limiting rods are fixedly sleeved with anti-folding pieces, and clamping holes matched with the limiting rods are formed in the tops of the limiting pipes. According to the utility model, through combination of the hard circuit board and the flexible circuit board, the circuit board is allowed to bend freely within a certain range and is not easy to damage, and the hard circuit board provides a stable electrical connection function and ensures reliability of signal transmission.

Description

Technical Field

[0001] The utility model relates to the technical field of soft-rigid combined boards, in particular to a flex-resistant soft-rigid combined circuit board. Background Art

[0002] A rigid-flex board is a new type of printed circuit board that has both the durability of a rigid circuit board and the adaptability of a flexible circuit board. Among all types of circuit boards, a rigid-flex board has the strongest resistance to harsh application environments, and is therefore favored by manufacturers of industrial control, medical, and military equipment.

[0003] During the use of the rigid-flex board, the flexible circuit board and the connection between the flexible circuit board and the rigid circuit board are often broken due to excessive pulling of the flexible circuit board. Utility Model Content

[0004] The purpose of the utility model is to provide a flex-resistant rigid-flex circuit board to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a flex-resistant rigid-flexible circuit board, comprising a first rigid circuit board and a second rigid circuit board, the first rigid circuit board and the second rigid circuit board are externally sleeved with an elastic limit frame, and a flexible circuit board body is arranged between the first rigid circuit board and the second rigid circuit board, insulating sleeves are fixedly arranged at the four corners of the first rigid circuit board and the second rigid circuit board, the top and bottom of the insulating sleeves are respectively fixedly connected with a limit tube and a limit rod, the limit tube and the limit rod are fixedly sleeved with an anti-bending piece, and the top of the limit tube is provided with a clamping hole matching the limit rod.

[0006] The elastic limiting frame is provided with mounting holes at the four corners, and the top and bottom of the elastic limiting frame are fixedly connected with double-sided adhesive layers.

[0007] The first rigid circuit board and the second rigid circuit board are designed to be opposite to each other, and components are fixedly arranged on the top of the first rigid circuit board and the bottom of the second rigid circuit board.

[0008] The two ends of the flexible circuit board body are respectively fixedly connected to the first rigid circuit board and the second rigid circuit board through welding parts, and the flexible circuit board body passes through the elastic limiting frame.

[0009] The first rigid circuit board and the second rigid circuit board include an insulating substrate inside, the top of the insulating substrate is covered with a conductive layer, the top of the conductive layer is covered with an insulating layer, and the top of the insulating layer is coated with a surface protection layer.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] The utility model combines a rigid circuit board with a flexible circuit board, allowing the circuit board to bend freely within a certain range without being easily damaged. The rigid circuit board provides a stable electrical connection function to ensure the reliability of signal transmission. The rigid circuit board is made of high-strength material and can withstand greater mechanical stress. Through reasonable structural design, the circuit board is more compact while maintaining functionality, making it easy to install and use. The structural design of the circuit board makes the replacement and maintenance of components more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a top view of the utility model;

[0013] Figure 2 It is the front view of the utility model;

[0014] Figure 3 It is a schematic diagram of the stacking of the first rigid circuit board and the second rigid circuit board of the utility model;

[0015] Figure 4 It is a cross-sectional view of the first rigid circuit board of the utility model.

[0016] In the figure: 1. first rigid circuit board; 101. insulating substrate; 102. conductive layer; 103. insulating layer; 104. surface protection layer; 2. second rigid circuit board; 3. elastic limit frame; 4. mounting hole; 5. insulating sleeve; 6. limit tube; 7. limit rod; 8. anti-bending part; 9. components; 10. welding part; 11. flexible circuit board body; 12. double-sided adhesive layer. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figure 1-4The utility model provides a technical solution: a flex-resistant rigid-flex circuit board, comprising a first rigid circuit board 1 and a second rigid circuit board 2, the first rigid circuit board 1 and the second rigid circuit board 2 are sleeved with an elastic limit frame 3 on their exteriors, and a flexible circuit board body 11 is arranged between the first rigid circuit board 1 and the second rigid circuit board 2, insulating sleeves 5 are fixedly arranged at the four corners of the first rigid circuit board 1 and the second rigid circuit board 2, the top and bottom of the insulating sleeve 5 are respectively fixedly connected with a limit tube 6 and a limit rod 7, an anti-bending member 8 is fixedly sleeved on the limit tube 6 and the limit rod 7, and a clamping hole matching the limit rod 7 is opened at the top of the limit tube 6.

[0019] The elastic limiting frame 3 is provided with mounting holes 4 at the four corners, and the top and bottom of the elastic limiting frame 3 are fixedly connected with double-sided adhesive layers 12 .

[0020] The first rigid circuit board 1 and the second rigid circuit board 2 are designed to be opposite to each other, and components 9 are fixedly arranged on the top of the first rigid circuit board 1 and the bottom of the second rigid circuit board 2 .

[0021] Two ends of the flexible circuit board body 11 are fixedly connected to the first rigid circuit board 1 and the second rigid circuit board 2 respectively through welding parts 10 , and the flexible circuit board body 11 passes through the elastic limiting frame 3 .

[0022] The first rigid circuit board 1 and the second rigid circuit board 2 include an insulating substrate 101 inside, the top of the insulating substrate 101 is covered with a conductive layer 102, the top of the conductive layer 102 is covered with an insulating layer 103, and the top of the insulating layer 103 is coated with a surface protection layer 104.

[0023] In actual use, the first rigid circuit board 1 and the second rigid circuit board 2 can be stacked by the cooperation of the limiting tube 6 and the limiting rod 7 .

[0024] Elastic limit frame 3: limits the deformation range of the first rigid circuit board 1 and the second rigid circuit board 2 when being bent to prevent damage caused by excessive bending. It is made of elastic material such as silicone or rubber and has good elasticity and folding resistance.

[0025] Flexible circuit board body 11: connects the first rigid circuit board 1 and the second rigid circuit board 2, and allows free bending within a certain range. Made of flexible materials such as polyimide (PI), it has good electrical properties and folding resistance.

[0026] Insulation sleeve 5, limiting tube 6 and limiting rod 7: further limit the deformation of the rigid circuit board and provide additional support and stability. The insulation sleeve 5 is usually made of insulating plastic, and the limiting tube 6 and limiting rod 7 are made of rigid materials such as metal or rigid plastic.

[0027] Anti-bending member 8: prevents excessive stress concentration during the bending process of the circuit board and improves the bending resistance. It is made of elastic material, such as rubber or silicone.

[0028] Double-sided adhesive layer 12: used to bond the elastic limiting frame 3 to the installed and fixed side wall to enhance stability.

[0029] Components 9: Realize the electrical functions of the circuit board, such as signal processing, power management, etc. Select according to specific functions, such as integrated circuits, resistors, capacitors, etc.

[0030] Soldering part 10: Reliably connects the flexible circuit board body 11 with the rigid circuit board. Usually made of metal, such as copper or nickel.

[0031] Insulating substrate 101: As the basis of the rigid circuit board, it provides good electrical insulation performance.

[0032] Conductive layer 102: used to form circuit patterns and achieve electrical connection.

[0033] Insulating layer 103: covers the conductive layer to prevent short circuits between circuits.

[0034] Surface protection layer 104: protects the circuit board from the influence of the external environment and improves durability.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flex-resistant rigid-flex circuit board, comprising a first rigid circuit board (1) and a second rigid circuit board (2), characterized in that: The first rigid circuit board (1) and the second rigid circuit board (2) are externally sleeved with elastic limit frames (3), and a flexible circuit board body (11) is arranged between the first rigid circuit board (1) and the second rigid circuit board (2). Insulating sleeves (5) are fixedly arranged at the four corners of the first rigid circuit board (1) and the second rigid circuit board (2), and the top and bottom of the insulating sleeves (5) are respectively fixedly connected to a limit tube (6) and a limit rod (7), and an anti-bending piece (8) is fixedly sleeved on the limit tube (6) and the limit rod (7), and a clamping hole matching the limit rod (7) is provided at the top of the limit tube (6).

2. The flex-resistant rigid-flex circuit board according to claim 1, characterized in that: The elastic limiting frame (3) is provided with mounting holes (4) at the four corners, and the top and bottom of the elastic limiting frame (3) are fixedly connected with double-sided adhesive layers (12).

3. The flex-resistant rigid-flex circuit board according to claim 1, characterized in that: The first rigid circuit board (1) and the second rigid circuit board (2) are designed with opposite surfaces, and components (9) are fixedly arranged on the top of the first rigid circuit board (1) and the bottom of the second rigid circuit board (2).

4. The flex-resistant rigid-flex circuit board according to claim 1, characterized in that: Two ends of the flexible circuit board body (11) are respectively fixedly connected to the first rigid circuit board (1) and the second rigid circuit board (2) via welding portions (10), and the flexible circuit board body (11) passes through the elastic limiting frame (3).

5. The flex-resistant rigid-flex circuit board according to claim 1, characterized in that: The first rigid circuit board (1) and the second rigid circuit board (2) comprise an insulating substrate (101) inside, the top of the insulating substrate (101) is covered with a conductive layer (102), the top of the conductive layer (102) is covered with an insulating layer (103), and the top of the insulating layer (103) is coated with a surface protection layer (104).

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