Flexible circuit board easy to tear and convenient to bend

Abstract

The utility model discloses a flexible circuit board easy to tear and convenient to bend, which comprises a flexible board body, the flexible board body comprises a lower insulating film layer, a circuit layer and an upper insulating film layer, the circuit layer is fixed on the insulating film layer in a laminated manner, the upper insulating film layer is fixed on the circuit layer in a laminated manner, and a plurality of groups of component welding positions are regularly arranged on the upper surface of the upper insulating film layer; a plurality of arc-shaped through hole sets are formed in the flexible plate body side by side, each arc-shaped through hole set is composed of a plurality of arc-shaped through holes arranged in sequence, a through groove is formed between every two adjacent arc-shaped through holes in each arc-shaped through hole set, the through grooves penetrate through the surfaces of the upper end and the lower end of the flexible plate body, the two ends of each through groove are communicated with the adjacent arc-shaped through holes, and the arc-shaped through holes are communicated with the arc-shaped through holes. A connecting point is formed on the flexible plate body in the middle of each through groove, and the flexible plate body is divided into a plurality of long-strip-shaped thin plates which can be torn manually by the arc-shaped through hole groups and the through grooves; the utility model can be torn manually without a cutting tool, is easy to be bent to be attached to a mounting surface, and is simple to use and convenient to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit boards, in particular to a flexible circuit board which is easy to tear and bend. Background Art

[0002] Flexible circuit board is a kind of printed circuit board with high reliability and excellent flexibility made of polyimide or polyester film as the base material. It is referred to as soft board or FPC, which has the characteristics of high wiring density, light weight and thin thickness.

[0003] In order to improve the production efficiency, traditional flexible circuit boards are made of a large flexible circuit board, which is then cut into multiple long independent small flexible circuit boards, and finally each small flexible circuit board is installed on a lamp or other electrical equipment for use. When cutting traditional flexible circuit boards into independent small flexible circuit boards, workers need to use scissors and other cutting tools to complete the work, which cannot be separated manually and is inconvenient to use; workers holding tools in the cutting process may cause damage to some circuits or components due to improper operation, and the shapes and specifications of the cut products are not uniform. Utility Model Content

[0004] In order to overcome at least one of the technical problems existing in the prior art, the utility model provides a flexible circuit board that is easy to tear and bend. It does not require cutting tools and can be torn manually. It can also be easily bent and attached to the installation surface. It is simple to use and easy to operate.

[0005] A flexible circuit board that is easy to tear and bend, comprising a flexible board body, the flexible board body comprising a lower insulating film layer, a circuit layer stacked and fixed on the insulating film layer, and an upper insulating film layer stacked and fixed on the circuit layer, wherein a plurality of component welding positions are regularly arranged on the upper surface of the upper insulating film layer; a plurality of arc-shaped through hole groups are arranged side by side on the flexible board body, each arc-shaped through hole group is composed of a plurality of arc-shaped through holes arranged in sequence, a through groove is provided between two adjacent arc-shaped through holes in each arc-shaped through hole group, each through groove passes through the upper and lower end surfaces of the flexible board body, the two ends of each through groove are connected to the adjacent arc-shaped through holes, a connection point is formed on the flexible board body in the middle of each through groove, and the arc-shaped through hole groups and the through grooves divide the flexible board body into a plurality of long thin strips that can be torn manually.

[0006] In some embodiments, the upper insulating film layer and the lower insulating film layer are polyimide films, and the upper and lower end surfaces of the circuit layer are bonded to the upper insulating film layer and the lower insulating film layer via an adhesive layer.

[0007] In some embodiments, the arc-shaped through hole has a width of 0.2 to 0.5 cm and a length of 0.9 to 1.3 cm, and the through groove is a straight groove with a width of 0.01 to 0.05 mm.

[0008] 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

[0009] 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:

[0010] Figure 1 It is a schematic diagram of the cross-sectional structure of the present application;

[0011] Figure 2 It is a schematic diagram of the structure of the present application viewed from above;

[0012] Figure 3 A schematic diagram of the connection structure between two adjacent long thin plates of the present application;

[0013] Figure 4 A schematic diagram of the structure of the long thin plate of the present application.

[0014] Reference numerals:

[0015] Flexible board 1, lower insulating film layer 100, circuit layer 101, upper insulating film layer 102, arc-shaped through hole group 103, arc-shaped through hole 104, through groove 105, connection point 106, lamp beads

[0016] 107 , adhesive layer 108 , long thin plate 109 . DETAILED DESCRIPTION

[0017] 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 only used to explain the present invention, and cannot be understood as limiting the present invention.

[0018] In the description of the present invention, it should be understood that descriptions involving orientation, such as the orientations or positional relationships indicated by terms such as "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside", etc., are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention 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 cannot be understood as a limitation on the present invention.

[0019] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 indirectly connected 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.

[0021] Reference Figure 1-Figure 4 A flexible circuit board that is easy to tear and bend, comprising a rectangular flexible board body 1, the flexible board body 1 comprising a lower insulating film layer 100, a circuit layer 101 laminated and fixed on the insulating film layer, and an upper insulating film layer 102 laminated and fixed on the circuit layer 101, and a plurality of component welding positions are regularly arranged on the upper surface of the upper insulating film layer 102, which can be used for welding electronic components such as lamp beads 107; a plurality of arc-shaped through hole groups 103 are arranged side by side on the flexible board body 1 by a device at one time, and each arc-shaped through hole group 103 is composed of a plurality of arc-shaped through holes 104 arranged in sequence, and each arc-shaped through hole group 104 is formed by a plurality of arc-shaped through holes 104 arranged in sequence. A through slot 105 is cut by a device between two adjacent arc-shaped through holes 104 in the arc-shaped through hole group 103. Each through slot 105 penetrates the upper and lower surfaces of the flexible board body 1. Both ends of each through slot 105 are connected to the adjacent arc-shaped through hole 104. A connection point 106 is formed on the flexible board body 1 in the middle of each through slot 105. The width and thickness of the connection point 106 are very small, similar to a thin line, and it is easy to be torn manually. The entire large flexible board body 1 has been divided into a plurality of long thin plates 109 that can be torn manually by the arc-shaped through hole group 103 and the through slot 105 located on the same center line. When in use, just grab one end of the flexible board body 1 with your hand and pull it slightly to tear each connection point 106, thereby obtaining an independent long small flexible circuit board. Because the connection point 106 is roughly located at the center line of the arc-shaped through hole 104, there will be arc grooves on both sides of the independent long strip of small flexible circuit board. Because of the arc grooves, the small flexible circuit board is easier to bend into an S shape or other shapes, and can also be more conveniently wrapped and installed on the surfaces of various different products, with good applicability.

[0022] In some embodiments, the upper insulating film layer 102 and the lower insulating film layer 100 are polyimide films. Polyimide, referred to as PI, is one of the organic polymer materials with the best comprehensive performance. It is resistant to high temperatures of more than 400°C and has a long-term use temperature range of -200 to 300°C. It has no obvious melting point and high insulation performance. The dielectric constant is 4.0 at 103 Hz and the dielectric loss is only 0.004 to 0.007. It belongs to F to H grade insulating materials. The upper and lower end surfaces of the circuit layer 101 are bonded to the upper insulating film layer 102 and the lower insulating film layer 100 by an adhesive layer 108. The production is convenient and the efficiency is high. The glue can be a polyurethane potting glue or a silicone potting glue.

[0023] In some embodiments, the width of the arc-shaped through hole 104 is 0.2 to 0.5 cm, and the length is 0.9 to 1.3 cm. The through groove 105 is a straight groove with a width of 0.01 to 0.05 mm. This structure divides the flexible board body 1 into a plurality of long thin plates 109 that can be torn apart manually. Each long thin plate 109 is connected only by a plurality of connection points 106 on the same straight line, and can be easily separated after being torn apart manually.

[0024] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. Although the embodiments of the utility model have been shown and described, ordinary technicians in this field can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and purpose of the utility model. The scope of the utility model is defined by the claims and their equivalents.

Claims

1. A flexible circuit board that is easy to tear and bend, comprising a flexible board body, characterized in that: The flexible board body includes a lower insulating film layer, a circuit layer stacked and fixed on the insulating film layer, and an upper insulating film layer stacked and fixed on the circuit layer. A plurality of component welding positions are regularly arranged on the upper surface of the upper insulating film layer; a plurality of arc-shaped through hole groups are arranged side by side on the flexible board body, each arc-shaped through hole group is composed of a plurality of arc-shaped through holes arranged in sequence, and a through groove is provided between two adjacent arc-shaped through holes in each arc-shaped through hole group, and each through groove passes through the upper and lower end surfaces of the flexible board body, and the two ends of each through groove are connected with the adjacent arc-shaped through holes, and a connection point is formed on the flexible board body in the middle of each through groove, and the arc-shaped through hole group and the through groove divide the flexible board body into a plurality of long thin strips that can be torn apart manually.

2. The flexible circuit board that is easy to tear and bend as claimed in claim 1, characterized in that: The upper insulating film layer and the lower insulating film layer are polyimide films, and the upper and lower end surfaces of the circuit layer are bonded to the upper insulating film layer and the lower insulating film layer through an adhesive layer.

3. The flexible circuit board that is easy to tear and bend as claimed in claim 2, characterized in that: The width of the arc-shaped through hole is 0.2 to 0.5 cm, and the length is 0.9 to 1.3 cm. The through groove is a straight groove with a width of 0.01 to 0.05 mm.

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