Rigid-flexible circuit board

Abstract

The utility model discloses a rigid-flex circuit board, which relates to the technical field of circuit boards, and comprises a rigid board, one end of the interior of the rigid board is connected with a flexible board by adopting a pressing process, a reinforcing connecting piece is arranged at the joint of the rigid board and the flexible board, and the reinforcing connecting piece comprises two reinforcing boards attached to the joint of the rigid board and the flexible board. And an anti-crease structure is arranged at one end of the reinforcing connecting piece and comprises mounting grooves formed in the two ends of the two reinforcing plates, bearing seats are mounted on one sides of the inner walls of the mounting grooves correspondingly, and rotating shafts are mounted on the inner walls of the bearing seats correspondingly. According to the utility model, the hard board and the soft board are reinforced by adopting the reinforcing connecting piece, the problem that the soft board and the hard board are separated when the hard board and the soft board are pulled by a larger external force is avoided, and a better anti-crease structure is arranged between the reinforcing connecting piece and the soft board, so that the condition that the circuit is damaged due to the crease of the soft board is avoided; and the normal use of the whole rigid-flex circuit board is ensured.

Description

Technical Field

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

[0002] Rigid-flex PCB is a special type of PCB that combines the characteristics of rigid PCB (hard PCB) and flexible PCB (soft PCB) to form a design with flexibility and bendability. Through a special lamination process, they are tightly connected together to form a whole. Due to its special design, Rigid-flex PCB has advantages in reliability, weight and volume. It is commonly used in mobile devices, medical equipment, aerospace and other fields, and is an important part of modern electronic technology.

[0003] At present, when a soft-hard combination circuit board is pulled by a large external force, the flexible board and the hard board will be separated, resulting in circuit board failure and affecting normal use. In order to solve this problem, the utility model patent with publication number CN219999683U discloses a firmly connected soft-hard combination circuit board, including a soft board, a hard board and a connector, wherein the hard board includes an upper board and a lower board, and the soft board extends between the upper board and the lower board; a joint is provided between the hard board and the soft board, and the connector includes It includes an upper connecting member and a lower connecting member, each of which includes a main bracket and a mounting column and a limiting hole arranged on the inner side of the main bracket. The bottom surface of the main bracket of the upper connecting member is attached to the top surface of the hard board, and the top surface of the main bracket of the lower connecting member is attached to the bottom surface of the hard board; the upper connecting member and the lower connecting member are respectively inserted into the main bracket of the hard board, the soft board and the lower connecting member, and the main bracket of the lower connecting member from both sides. By arranging the connecting members, not only the joint of the hard-soft board can be reinforced, but also the initial positioning of the two can be facilitated.

[0004] In conjunction with the above patent, the prior art has the following deficiencies: when a connector is used to reinforce the soft board and the hard board of a circuit board, since there is a certain angle between the connector and the soft board of the circuit board, and there is no good anti-crease structure between the connector and the soft board of the circuit board, when the connecting part between the soft board and the connector is bent, the soft board is prone to creases, which may damage the circuit. Therefore, it is urgent to design a circuit board that combines soft and hard components to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings of the prior art and propose a hard-soft circuit board. Its advantage is that a good anti-crease structure can be set between the reinforcing connector and the soft board to avoid the crease of the soft board and thus the damage of the circuit, thus ensuring the normal use of the entire hard-soft circuit board.

[0006] To achieve the above object, the utility model adopts the following technical solutions:

[0007] A circuit board combining hard and soft parts includes a rigid board. One end inside the rigid board is connected with a flexible board by a lamination process, and a reinforcement connector is arranged at the connection part of the rigid board and the flexible board. The reinforcement connector includes two reinforcement plates attached to the connection part of the rigid board and the flexible board. One end of the reinforcement connector is provided with an anti-crease structure, and the anti-crease structure includes mounting grooves opened at both ends of the two reinforcement plates. One side of the inner wall of each mounting groove is provided with a bearing seat, and the inner walls of the bearing seats are all provided with rotating shafts. On the other side of the inner wall of each mounting groove, a torsion spring is installed on the outer wall of the rotating shaft. One end of each rotating shaft is installed with a rotating plate through a screw, and a sliding roller is rotatably connected between the ends of two aligned rotating plates by a pin shaft. The two sliding rollers are respectively slidably arranged on the top surface and the bottom surface of the flexible board.

[0008] Through the above technical solutions, the connection part between the flexible board and the reinforcement connector is effectively treated to prevent creases, avoiding the situation that the flexible board is creased and the circuit is damaged, and ensuring the normal use of the entire circuit board combining hard and soft parts.

[0009] The utility model is further set as that the cross sections of the two sliding rollers are both designed in an I shape, and the flexible board is arranged in the middle area of the sliding rollers.

[0010] Through the above technical solutions, the stability of the flexible board at the sliding rollers is ensured, and the problem that the flexible board is separated from the sliding rollers is avoided.

[0011] The utility model is further set as that one end of the reinforcement plate close to the sliding roller is designed into an arc shape.

[0012] Through the above technical solutions, the flexible board can be bent without resistance at the end face of the reinforcement plate.

[0013] The utility model is further set as that the rigid board is composed of an upper layer board and a lower layer board, and the flexible board is arranged between the upper layer board and the lower layer board.

[0014] Through the above technical solutions, it is convenient to laminate the flexible board into the two-layer rigid board.

[0015] The utility model is further set as that two positioning holes are respectively penetrated and opened on one side of the top of the upper layer board, one side of the top of the lower layer board and one side of the top of the flexible board, and two reinforcement holes are respectively penetrated and opened on both sides of the top of the two reinforcement plates. The positions of the reinforcement holes correspond to the positions of the positioning holes, and a reinforcement structure is arranged inside the adjacent two reinforcement holes and one of the positioning holes.

[0016] The utility model is further configured such that the reinforcement structure includes positioning rods inserted into adjacent two reinforcement holes, and the two positioning rods are butted after passing through the positioning holes. An embedding groove is formed at the bottom of the positioning rod located above, and an embedding head is fixed at the top of the positioning rod located below. The embedding head is clamped inside the embedding groove.

[0017] Through the above technical solutions, the two reinforcement plates can be fixed on the hard board and the soft board, avoiding the problem that the soft board and the hard board are separated from each other when the rigid-flex printed circuit board is pulled by a large external force.

[0018] The utility model is further configured such that butt joint plates are fixed at both bottom ends of the two reinforcement plates close to the sliding roller, and the two butt joint plates are attached to each other. The butt joint plates are attached to the edge of the soft board. A butt joint opening is formed at the bottom of the butt joint plate located above, and a butt joint block inserted into the butt joint opening is fixed at the top of the butt joint plate located below.

[0019] Through the above technical solutions, the stability of the two reinforcement plates can be ensured before the two reinforcement plates are reinforced.

[0020] The utility model is further configured such that the reinforcement plate, the butt joint plate, the positioning rod, the sliding roller, and the rotating plate are all designed to be made of insulating materials.

[0021] Through the above technical solutions, the influence on the transmission of electrical signals is effectively reduced, ensuring the stability of signal transmission.

[0022] The beneficial effects of the utility model are as follows:

[0023] In the utility model, through the hard board, the reinforcement connecting piece, the reinforcement plate, the positioning rod, the embedding groove, the embedding head, and the soft board provided, when the hard board and the soft board are connected together by a lamination process, the embedding head can be pressed into the embedding groove at the same time. The two reinforcement plates are fixed on the hard board and the soft board by the reinforcement effect of the two positioning rods, avoiding the problem that the soft board and the hard board are separated from each other when the rigid-flex printed circuit board is pulled by a large external force, and making the operation convenient.

[0024] In the utility model, through the cooperation of the sliding roller, the rotating plate, the bearing seat, the rotating shaft, the coil spring, etc., a better anti-crease structure can be provided between the reinforcement connecting piece and the soft board. When the connecting part between the soft board and the reinforcement connecting piece is bent, the sliding roller and the rotating plate can be driven to rotate synchronously, effectively performing anti-crease treatment on this connecting part, avoiding the situation that the soft board has creases and further damaging the circuit, and ensuring the normal use of the entire rigid-flex printed circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a perspective view of a rigid-flex printed circuit board proposed by the utility model;

[0026] Figure 2Front view of a reinforcement connector and anti - crease structure for a rigid - flexible printed circuit board proposed by the present utility model;

[0027] Figure 3 Schematic diagram of a positioning hole structure for a rigid - flexible printed circuit board proposed by the present utility model;

[0028] Figure 4 Schematic diagram of a positioning rod and sliding roller structure for a rigid - flexible printed circuit board proposed by the present utility model;

[0029] Figure 5 Schematic diagram of a reinforcement hole and rotating shaft structure for a rigid - flexible printed circuit board proposed by the present utility model;

[0030] Figure 6 Schematic diagram of an installation groove and coil spring structure for a rigid - flexible printed circuit board proposed by the present utility model;

[0031] Figure 7 Schematic diagram of an embedding head structure for a rigid - flexible printed circuit board proposed by the present utility model.

[0032] In the figure: 1, rigid board; 101, upper layer board; 102, lower layer board; 2, reinforcement connector; 201, reinforcement board; 202, docking board; 203, positioning hole; 204, positioning rod; 205, reinforcement hole; 206, embedding groove; 207, docking port; 208, embedding head; 3, flexible board; 4, anti - crease structure; 401, sliding roller; 402, rotating plate; 403, bearing seat; 404, rotating shaft; 405, installation groove; 406, coil spring. Detailed implementation manners

[0033] The technical solutions of this patent will be further described in detail below in combination with the specific implementation manners.

[0034] The embodiments of this patent are described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain this patent and should not be construed as a limitation of this patent.

[0035] In the description of this patent, it should be understood that the orientation or positional relationships indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this patent.

[0036] In the description of this patent, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "linkage", and "setting" should be understood in a broad sense. For example, it can be fixedly connected and set, or detachably connected and set, or integrally connected and set. For those of ordinary skill in the art, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0037] Referring to Figures 1 - 7 , a circuit board combining hard and soft parts, includes a hard board 1. One end inside the hard board 1 is connected with a flexible board 3 by a lamination process. The hard board 1 is composed of an upper layer board 101 and a lower layer board 102, and the flexible board 3 is arranged between the upper layer board 101 and the lower layer board 102. A reinforcement connecting part 2 is arranged at the connection part of the hard board 1 and the flexible board 3. The reinforcement connecting part 2 includes two reinforcement plates 201 attached to the connection part of the hard board 1 and the flexible board 3. One end of the reinforcement connecting part 2 is provided with an anti-crease structure 4. The anti-crease structure 4 includes mounting grooves 405 opened at both ends of the two reinforcement plates 201. A bearing seat 403 is installed on one side of the inner wall of each mounting groove 405, and a rotating shaft 404 is installed on the inner wall of each bearing seat 403. A torsion spring 406 is installed between the other side of the inner wall of each mounting groove 405 and the outer wall of the rotating shaft 404. One end of each rotating shaft 404 is installed with a rotating plate 402 by a screw, and a sliding roller 401 is rotatably connected between one ends of two aligned rotating plates 402 by a pin shaft. The two sliding rollers 401 are respectively slidably arranged on the top surface and the bottom surface of the flexible board 3. The cross sections of the two sliding rollers 401 are both designed in an I shape, and the flexible board 3 is arranged in the middle area of the sliding rollers 401. By using the above-mentioned sliding rollers 401, rotating plates 402, bearing seats 403, rotating shafts 404, and torsion springs 406, a better anti-crease structure 4 can be set. When the connection part between the flexible board 3 and the reinforcement connecting part 2 is bent, it drives the sliding rollers 401 and the rotating plates 402 to rotate synchronously, effectively preventing creases at this connection part and avoiding the situation where the flexible board 3 has creases and the circuit is damaged.

[0038] For the convenience of bending operation of the flexible board 3, referring to Figure 4 and Figure 5 , one end of the reinforcement plate 201 close to the sliding roller 401 is designed to be arc-shaped, so that the flexible board 3 can be bent without resistance at the end face of the reinforcement plate 201, making its bending more convenient.

[0039] To avoid the problem that the flexible board 3 and the hard board 1 are separated when subjected to a large external pulling force, referring to Figure 1 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7, two positioning holes 203 are penetrated and opened on one side of the top of the upper board 101, one side of the top of the lower board 102, and one side of the top of the flexible board 3. Reinforcement holes 205 are penetrated and opened on both sides of the top of the two reinforcement plates 201. The positions of the reinforcement holes 205 correspond to the positions of the positioning holes 203. A reinforcement structure is arranged inside adjacent two reinforcement holes 205 and inside one of the positioning holes 203. The reinforcement structure includes positioning rods 204 inserted into adjacent two reinforcement holes 205, and the two positioning rods 204 are butted after passing through the positioning holes 203. An embedding groove 206 is opened at the bottom of the positioning rod 204 located above, and an embedding head 208 is fixed at the top of the positioning rod 204 located below. The embedding head 208 is clamped inside the embedding groove 206. By using the above-mentioned positioning rods 204, embedding grooves 206 and embedding heads 208, when the rigid board 1 and the flexible board 3 are connected together by a lamination process, the embedding head 208 can be pressed into the embedding groove 206 at the same time. The two reinforcement plates 201 are fixed on the rigid board 1 and the flexible board 3 by the reinforcement effect of the two positioning rods 204, avoiding the problem that the flexible board 3 and the rigid board 1 are separated when the rigid-flex printed circuit board is pulled by a large external force, and the operation is convenient.

[0040] To ensure the stability between the reinforcement plates 201, referring to Figure 2 , Figure 4 and Figure 5 , docking plates 202 are fixed at both ends of the bottom of the two reinforcement plates 201 close to the roller 401, and the two docking plates 202 are attached to each other. The docking plates 202 are attached to the end edge of the flexible board 3. A docking port 207 is opened at the bottom of the docking plate 202 located above, and a docking block inserted into the docking port 207 is fixed at the top of the docking plate 202 located below. By using the above-mentioned docking plates 202, docking ports 207 and docking blocks, before the two reinforcement plates 201 are reinforced, the docking blocks can be inserted into the docking ports 207 to ensure the firmness of the two reinforcement plates 201.

[0041] To ensure the normal use of the circuit board, referring to Figure 1 , Figure 2 , Figure 4 and Figure 5 , the reinforcement plates 201, docking plates 202, positioning rods 204, rollers 401, and rotating plates 402 are all designed to be made of insulating materials. Using insulating materials can effectively reduce the influence on the transmission of electrical signals and ensure the stability of signal transmission.

[0042] Working principle: When in use, the user arranges the two reinforcing plates 201 on the reinforcing connecting member 2 respectively above and below the rigid-flex printed circuit board, inserts the positioning rod 204 into the reinforcing hole 205 and the positioning hole 203, and while performing the lamination process on the rigid board 1 and the flexible board 3, presses the embedding head 208 into the embedding groove 206, so as to fix the two reinforcing plates 201 on the rigid board 1 and the flexible board 3, ensuring the reinforcement between the rigid board 1 and the flexible board 3. Then, through the cooperation of the sliding roller 401, the rotating plate 402, the bearing seat 403, the rotating shaft 404, the torsion spring 406, etc., a better anti-crease structure 4 is provided at the connection between the reinforcing connecting member 2 and the flexible board 3. When the connection part between the flexible board 3 and the reinforcing connecting member 2 is bent, the flexible board 3 will drive the sliding roller 401 and the rotating plate 402 to rotate synchronously, effectively performing anti-crease treatment on this connection part. At this time, the torsion spring 406 deforms. When the flexible board 3 returns to its original position, the reset action of the torsion spring 406 drives the entire anti-crease structure 4 to return to its original position, and the anti-crease measure is continued.

[0043] The above is only the preferred specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A rigid-flexible circuit board, comprising a rigid board (1), characterized in that: One end of the interior of the hard plate (1) is connected to the soft plate (3) by a pressing process, and a reinforcing connector (2) is provided at the connection between the hard plate (1) and the soft plate (3), the reinforcing connector (2) comprising two reinforcing plates (201) attached to the connection between the hard plate (1) and the soft plate (3), an anti-crease structure (4) is provided at one end of the reinforcing connector (2), and the anti-crease structure (4) comprises mounting grooves (405) provided at both ends of the two reinforcing plates (201), the mounting grooves (405) A bearing seat (403) is installed on one side of the inner wall, and a rotating shaft (404) is installed on the inner wall of the bearing seat (403). A coil spring (406) is installed on the other side of the inner wall of the mounting groove (405) and the outer wall of the rotating shaft (404). A rotating plate (402) is installed on one end of the rotating shaft (404) via a screw, and a sliding roller (401) is rotatably connected between one ends of two flush rotating plates (402) via a pin shaft. The two sliding rollers (401) are respectively slidably arranged on the top surface and the bottom surface of the soft plate (3).

2. A rigid-flexible circuit board according to claim 1, characterized in that: The cross-sections of the two sliding rollers (401) are both I-shaped, and the soft plate (3) is arranged in the middle area of ​​the sliding rollers (401).

3. The rigid-flexible circuit board according to claim 1, characterized in that: One end of the reinforcing plate (201) close to the sliding roller (401) is in the shape of an arc surface.

4. The hard-flexible circuit board according to claim 2, characterized in that: The hard board (1) is composed of an upper board (101) and a lower board (102), and the soft board (3) is arranged between the upper board (101) and the lower board (102).

5. The rigid-flexible circuit board according to claim 4, characterized in that: Two positioning holes (203) are provided through one side of the top of the upper plate (101), one side of the top of the lower plate (102), and one side of the top of the soft plate (3), and reinforcement holes (205) are provided through both sides of the top of the two reinforcement plates (201), the positions of the reinforcement holes (205) correspond to the positions of the positioning holes (203), and reinforcement structures are provided inside two adjacent reinforcement holes (205) and inside one of the positioning holes (203).

6. The rigid-flexible circuit board according to claim 5, characterized in that: The reinforcement structure comprises a positioning rod (204) inserted into two adjacent reinforcement holes (205), and the two positioning rods (204) are butted against each other after passing through the positioning holes (203), an embedding groove (206) is provided at the bottom of the upper positioning rod (204), and an embedding head (208) is fixed at the top of the lower positioning rod (204), and the embedding head (208) is embedded in the embedding groove (206).

7. The rigid-flexible circuit board according to claim 6, characterized in that: The two reinforcement plates (201) are both fixed with docking plates (202) at both ends of the bottom close to the sliding roller (401), and the two docking plates (202) are fitted together, and the docking plates (202) are fitted to the end edges of the soft plate (3), and a docking port (207) is provided at the bottom of the upper docking plate (202), and a docking block inserted into the docking port (207) is fixed at the top of the lower docking plate (202).

8. The rigid-flexible circuit board according to claim 7, characterized in that: The reinforcing plate (201), the docking plate (202), the positioning rod (204), the sliding roller (401), and the rotating plate (402) are all made of insulating materials.

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