Flexible circuit board capable of double-sided connection

Abstract

The utility model provides a flexible circuit board capable of double-sided connection, which relates to the technical field of flexible circuit boards and comprises an epoxy resin rubber sleeve, connecting circular truncated cones are arranged at four corners of the epoxy resin rubber sleeve, adhesion fixing seats are in threaded connection with the interiors of the connecting circular truncated cones, and elastic fixing pads are fixedly mounted in the adhesion fixing seats. And one end of the elastic fixing pad is fixedly connected with a plurality of layers of adhesive films. The multi-layer circuit board has the advantages that the rubber sleeve is arranged on the circumference of the multi-layer circuit board for protection, the detachable adhesion fixing structures are arranged at the four corners of the rubber sleeve, the adhesion fixing structures are detached according to the requirement of the mounting end face of the circuit board, and the adhesion fixing structures are adjusted to the mounting face of the circuit board. Through the adhesion effect between the adhesion fixing structure and the mounting plane, the mounting stability of the circuit board is enhanced, the circuit board is convenient to disassemble and assemble for many times by arranging the multiple layers of adhesion structures, and the convenience of connection and use of the circuit board is improved.

Description

Technical Field

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

[0002] Double-sided flexible circuit board is referred to as "soft board", commonly known as FPC in the industry. It is a printed circuit board made of flexible insulating substrate, which has many advantages that rigid printed circuit boards do not have. For example, it can be bent, wound, folded, etc. The use of flexible circuit boards can greatly reduce the size of electronic products, and meet the needs of electronic products to develop in the direction of high density, miniaturization, and high reliability. Therefore, flexible circuit boards have been widely used in aerospace, military, mobile communications, laptops, computer peripherals, PDAs, digital cameras, and other fields or products.

[0003] CN202321483040.7 introduces a flexible circuit board that can be connected on both sides. Single panels are connected to each other to form an independent double panel to achieve the function of double-sided connection. Its processing method is simple and easy to implement, which can effectively improve production efficiency and reduce production costs. It can achieve conduction on both sides without the need for electroplating process, and further reduce the width and line spacing of the circuit while maintaining high reliability. However, the circuit board needs to be fixed with screws when it is connected and fixed, which makes the connection more troublesome. Utility Model Content

[0004] Therefore, the purpose of the present invention is to provide a flexible circuit board capable of double-sided connection, so as to solve the problems mentioned in the background technology and overcome the deficiencies existing in the prior art.

[0005] In order to achieve the above-mentioned purpose, an embodiment of one aspect of the utility model provides a flexible circuit board that can be connected on both sides, including a substrate layer, copper foil protective layer groups are arranged at both ends of the substrate layer, epoxy resin rubber sleeves are fixedly installed on the surface of the copper foil protective layer group, connecting frustums are arranged at the four corners of the epoxy resin rubber sleeve, the internal thread of the connecting frustum is connected to an adhesive fixing seat, an elastic fixing pad is fixedly installed inside the adhesive fixing seat, one end of the elastic fixing pad is fixedly connected to a multi-layer adhesive film, and the middle part of the epoxy resin rubber sleeve is fixedly connected to a fastening rib.

[0006] Preferably, any of the above schemes comprises a copper foil protective layer group including a gold-plated layer, a copper foil layer and a protective film, the gold-plated layer is located on one side of the substrate layer, a copper foil layer is provided on the side of the gold-plated layer away from the substrate layer, and a protective film is provided on the side of the copper foil layer away from the gold-plated layer.

[0007] By adopting the above technical solution, a mutually connected conductive structure is formed on both sides of the substrate layer through the copper foil protective layer group, so that both sides of the circuit board can be connected and used.

[0008] Preferably, any of the above schemes has a protective groove adapted to the copper foil protective layer group formed inside the epoxy resin sleeve, and a threaded groove adapted to the adhesive fixing seat formed inside the connecting truncated cone.

[0009] The above technical solution is adopted: an epoxy resin sleeve is set to cover and protect the entire circuit board to enhance the stability of the circuit board during use, and a threaded groove is opened inside the connecting cone to facilitate the disassembly and assembly of the adhesive fixing seat.

[0010] Preferably, in any of the above schemes, a threaded connection column is provided at one end of the adhesive fixing seat, and a movable groove adapted to the elastic fixing pad is provided at the other end of the adhesive fixing seat.

[0011] The above technical solution is adopted: a threaded connection is made by using a threaded connection column and a connecting cone at one end of the adhesive fixing seat, the adhesive fixing seat can be disassembled and assembled by rotating it, and the adhesive fixing seat supports and guides the elastic fixing pad to ensure the stability of the movement of the elastic fixing pad.

[0012] Preferably, any of the above schemes comprises a support spring and a support pad, wherein the support spring is fixedly mounted inside the adhesive fixing seat, and one end of the support spring is fixedly mounted with a support pad movably connected to the adhesive fixing seat.

[0013] The above technical solution is adopted: the support spring supports the support pad, and the elasticity of the support spring is used to push the support pad to a position away from the adhesion fixing seat, thereby increasing the pressure between the support pad and the installation plane, which is beneficial to enhancing the adhesion stability.

[0014] Preferably, any of the above schemes is that the size of the multi-layer adhesive film is smaller than the size of the support pad, and the multi-layer adhesive film is composed of a plurality of double-sided films overlapped with each other.

[0015] The above technical solution is adopted: the circuit board is fixed by bonding one side of the multi-layer adhesive film and the installation surface, and the convenience and stability of the circuit board installation are enhanced by adhesion. A layer of adhesive film is used for each installation and bonding, and the circuit board can be disassembled and assembled multiple times, thereby improving the convenience of disassembly and assembly of the circuit board.

[0016] Preferably, any of the above schemes comprises transverse ribs and vertical ribs, both ends of the transverse ribs and vertical ribs are fixedly connected to the epoxy resin sleeves, and the transverse ribs and vertical ribs are vertically distributed.

[0017] The above technical solution is adopted: the protective strength of the epoxy resin sleeve is enhanced by mutually perpendicular transverse ribs and vertical ribs, thereby improving the protective ability of the circuit board.

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

[0019] 1. A rubber sleeve is provided on the circumference of the multi-layer circuit board for protection, and a detachable adhesive fixing structure is provided at the four corners of the rubber sleeve. The adhesive fixing structure is disassembled and assembled according to the requirements of the installation end surface of the circuit board, and the adhesive fixing structure is adjusted to the installation side of the circuit board. The stability of the circuit board installation is enhanced by the adhesion between the adhesive fixing structure and the installation plane. The multi-layer adhesive structure is provided to facilitate multiple disassembly and assembly of the circuit board, thereby improving the convenience of connection and use of the circuit board.

[0020] 2. An elastic support structure is set inside the adhesive structure to enhance the pressure between the adhesive structure and the installation plane. By increasing the pressure, the adhesion stability of the adhesive structure is improved, which is beneficial to improving the stability of circuit board installation.

[0021] 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

[0022] 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:

[0023] Figure 1 It is a structural schematic diagram according to an embodiment of the utility model;

[0024] Figure 2 It is a schematic diagram of an explosion structure according to an embodiment of the utility model;

[0025] Figure 3 It is a structural schematic diagram of an adhesive fixing seat according to an embodiment of the utility model;

[0026] Figure 4 It is a schematic cross-sectional structure diagram of an adhesive fixing seat according to an embodiment of the utility model;

[0027] Among them: 1-base material layer, 2-copper foil protective layer group, 3-epoxy resin rubber sleeve, 4-connecting frustum, 5-adhesive fixing seat, 6-elastic fixing pad, 61-support spring, 62-support pad, 7-multi-layer adhesive film, 8-fastening ribs, 81-transverse ribs, 82-vertical ribs, 9-threaded grooves, 10-threaded connecting columns, 11-movable grooves. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0029] like Figure 1-4As shown, a double-sided connected flexible circuit board according to an embodiment of the utility model comprises a substrate layer 1, copper foil protective layer groups 2 are arranged at both ends of the substrate layer 1, epoxy resin rubber sleeves 3 are fixedly installed on the surface of the copper foil protective layer group 2, connecting frustums 4 are arranged at the four corners of the epoxy resin rubber sleeve 3, the internal thread of the connecting frustum 4 is connected to an adhesive fixing seat 5, an elastic fixing pad 6 is fixedly installed inside the adhesive fixing seat 5, one end of the elastic fixing pad 6 is fixedly connected to a multi-layer adhesive film 7, and a fastening rib 8 is fixedly connected to the middle of the epoxy resin rubber sleeve 3.

[0030] Preferably, from any of the above schemes, the copper foil protective layer group 2 includes a gold-plated layer, a copper foil layer and a protective film, the gold-plated layer is located on one side of the substrate layer 1, a copper foil layer is provided on the side of the gold-plated layer away from the substrate layer 1, and a protective film is provided on the side of the copper foil layer away from the gold-plated layer.

[0031] The above technical solution is adopted: a mutually connected conductive structure is formed on both sides of the substrate layer 1 through the copper foil protection layer group 2, so that both sides of the circuit board can be connected and used.

[0032] Preferably, any of the above schemes has a protective groove adapted to the copper foil protective layer group 2 formed inside the epoxy resin rubber sleeve 3 , and a threaded groove 9 adapted to the adhesive fixing seat 5 formed inside the connecting truncated table 4 .

[0033] The above technical solution is adopted: an epoxy resin sleeve 3 is provided to cover and protect the entire circuit board to enhance the stability of the circuit board during use, and a threaded groove 9 is provided inside the connecting truncated cone 4 to facilitate the disassembly and assembly of the adhesive fixing seat 5.

[0034] Preferably, any of the above solutions has one end of the adhesive fixing seat 5 provided with a threaded connection column 10 , and the other end of the adhesive fixing seat 5 is provided with a movable groove 11 adapted to the elastic fixing pad 6 .

[0035] The above technical solution is adopted: the threaded connection column 10 at one end of the adhesive fixing seat 5 is threadedly connected with the connecting truncated cone 4, and the adhesive fixing seat 5 can be disassembled and assembled by rotating it, and the adhesive fixing seat 5 supports and guides the elastic fixing pad 6 to ensure the stability of the movement of the elastic fixing pad 6.

[0036] Preferably, in any of the above schemes, the elastic fixing pad 6 includes a supporting spring 61 and a supporting pad 62 , the supporting spring 61 is fixedly mounted inside the adhesive fixing seat 5 , and one end of the supporting spring 61 is fixedly mounted with the supporting pad 62 movably connected to the adhesive fixing seat 5 .

[0037] The above technical solution is adopted: the support spring 61 supports the support pad 62, and the elasticity of the support spring 61 is used to push the support pad 62 to a position away from the adhesion fixing seat 5, thereby increasing the pressure between the support pad 62 and the installation plane, which is beneficial to enhancing the adhesion stability.

[0038] Preferably, any of the above solutions has a size of the multi-layer adhesive film 7 that is smaller than the size of the support pad 62 , and the multi-layer adhesive film 7 is composed of a plurality of double-sided films stacked on top of each other.

[0039] The above technical solution is adopted: the circuit board is fixed by bonding one side of the multi-layer adhesive film 7 and the installation surface, and the convenience and stability of the circuit board installation are enhanced by adhesion. A layer of adhesive film 7 is used for each installation and bonding, and the circuit board can be disassembled and assembled multiple times, thereby improving the convenience of disassembly and assembly of the circuit board.

[0040] Preferably, any of the above schemes comprises a transverse rib 8 and a vertical rib 82 , both ends of the transverse rib 81 and the vertical rib 82 are fixedly connected to the epoxy resin sleeve 3 , and the transverse rib 81 and the vertical rib 82 are vertically distributed.

[0041] The above technical solution is adopted: the protective strength of the epoxy resin sleeve 3 is enhanced by mutually perpendicular transverse ribs 81 and vertical ribs 82, thereby improving the protective capability of the circuit board.

[0042] The utility model is a flexible circuit board capable of double-sided connection, and its working principle is as follows:

[0043] According to the requirements of the end face where the circuit board is to be installed, the adhesive fixing seat 5 is rotated to unscrew it from the inside of the connecting cone 4, and then the adhesive fixing seat 5 is screwed into the end face to be installed, and the circuit board is installed to the required position. The support spring 61 pushes the support pad 62 to bond the multi-layer adhesive film 7 to the installation plane.

[0044] Compared with the prior art, the present invention has the following beneficial effects:

[0045] 1. A rubber sleeve is provided on the circumference of the multi-layer circuit board for protection, and a detachable adhesive fixing structure is provided at the four corners of the rubber sleeve. The adhesive fixing structure is disassembled and assembled according to the requirements of the installation end surface of the circuit board, and the adhesive fixing structure is adjusted to the installation side of the circuit board. The stability of the circuit board installation is enhanced by the adhesion between the adhesive fixing structure and the installation plane. The multi-layer adhesive structure is provided to facilitate multiple disassembly and assembly of the circuit board, thereby improving the convenience of connection and use of the circuit board.

[0046] 2. An elastic support structure is set inside the adhesive structure to enhance the pressure between the adhesive structure and the installation plane. By increasing the pressure, the adhesion stability of the adhesive structure is improved, which is beneficial to improving the stability of circuit board installation.

Claims

1. A flexible circuit board capable of double-sided connection, comprising a substrate layer (1), wherein both ends of the substrate layer (1) are provided with a copper foil protective layer group (2), characterized in that: An epoxy resin rubber sleeve (3) is fixedly installed on the surface of the copper foil protective layer group (2), and connecting truncated cones (4) are arranged at the four corners of the epoxy resin rubber sleeve (3). The internal thread of the connecting truncated cone (4) is connected to an adhesive fixing seat (5), and an elastic fixing pad (6) is fixedly installed inside the adhesive fixing seat (5). One end of the elastic fixing pad (6) is fixedly connected to a multi-layer adhesive film (7), and the middle part of the epoxy resin rubber sleeve (3) is fixedly connected to a fastening rib (8).

2. A double-sided connected flexible circuit board as claimed in claim 1, characterized in that: The copper foil protective layer group (2) comprises a gold-plated layer, a copper foil layer and a protective film, wherein the gold-plated layer is located on one side of the substrate layer (1), a copper foil layer is provided on the side of the gold-plated layer away from the substrate layer (1), and a protective film is provided on the side of the copper foil layer away from the gold-plated layer.

3. A double-sided connected flexible circuit board as claimed in claim 2, characterized in that: The epoxy resin rubber sleeve (3) is provided with a protective groove that matches the copper foil protective layer group (2), and the connecting truncated cone (4) is provided with a thread groove (9) that matches the adhesive fixing seat (5).

4. A double-sided connected flexible circuit board as claimed in claim 3, characterized in that: A threaded connection column (10) is provided at one end of the adhesive fixing seat (5), and a movable groove (11) adapted to the elastic fixing pad (6) is provided at the other end of the adhesive fixing seat (5).

5. A double-sided connected flexible circuit board as claimed in claim 4, characterized in that: The elastic fixing pad (6) comprises a supporting spring (61) and a supporting pad (62); the supporting spring (61) is fixedly mounted inside the adhesive fixing seat (5); one end of the supporting spring (61) is fixedly mounted with the supporting pad (62) movably connected to the adhesive fixing seat (5).

6. A double-sided connected flexible circuit board as claimed in claim 5, characterized in that: The size of the multi-layer adhesive film (7) is smaller than the size of the supporting pad (62), and the multi-layer adhesive film (7) is composed of a plurality of double-sided films stacked on top of each other.

7. A double-sided connected flexible circuit board as claimed in claim 6, characterized in that: The fastening ribs (8) include transverse ribs (81) and vertical ribs (82), both ends of the transverse ribs (81) and the vertical ribs (82) are fixedly connected to the epoxy resin rubber sleeve (3), and the transverse ribs (81) and the vertical ribs (82) are vertically distributed.

Images