Flexible circuit board with bending protection structure

Abstract

The utility model discloses a flexible circuit board with a bending protection structure, which comprises a flexible circuit board, the top of the flexible circuit board is provided with four upper limiting blocks, the bottom of the flexible circuit board is provided with lower limiting blocks matched with the upper limiting blocks for use, and the lower limiting blocks are arranged at the bottom of the flexible circuit board. The bottom of the upper limiting block is fixedly connected with a groove block, the bottom of the groove block penetrates to the bottom of the flexible circuit board, the top of the lower limiting block is fixedly connected with a fixing plug used in cooperation with the groove block, and the position, located at the bottom of the flexible circuit board, of the inner side of the lower limiting block is fixedly connected with a bending protection layer. The top of the upper limiting block is provided with anti-skid lines. According to the utility model, firstly, the bending protection layer is used for supporting the flexible circuit board to prevent the flexible circuit board from being excessively bent, and at the moment, the bending protection layer can be used for protecting and supporting the flexible circuit board, so that the effect of a bending protection structure is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of flexible circuit board, concretely to a flexible circuit board with bending protection structure. BACKGROUND

[0002] Flexible circuit board is the printed circuit of flexible insulating base material, has the characteristics such as high wiring density, light weight, thin thickness, bending property, and flexible circuit board provides excellent electrical performance, can satisfy the design needs of smaller and higher density installation, also helps to reduce assembly process and enhance reliability, it is the solution to meet the miniaturization and mobile requirements of electronic products, can be freely bent, wound, folded, can withstand millions of dynamic bending without damaging the wire, can be arranged arbitrarily according to the spatial layout requirement, and can be moved and stretched arbitrarily in three-dimensional space, so as to achieve the integration of component assembly and wire connection.

[0003] According to the patent number CN207835908U published by China patent network, the patent name is a kind of flexible circuit board, including from bottom to top sequentially arranged insulating layer, adhesive layer, conductive adhesive layer and metal copper layer, the pattern of the conductive adhesive layer is consistent with the circuit pattern, the pattern of the metal copper layer is consistent with the circuit pattern, compared with the prior art flexible circuit board, the utility model has the advantages of thinner, low cost, simple preparation, environmental protection etc., but the flexible circuit board does not have bending protection structure, when using flexible circuit board, flexible circuit board is very easy to damage because of excessive bending, lead to flexible circuit board fracture, lead to flexible circuit board cannot be used.

[0004] Therefore, it is necessary to design and reform flexible circuit board, so that it has bending protection structure. UTILITY MODEL CONTENTS

[0005] To solve the problems in the above background art, the utility model aims at providing a kind of flexible circuit board with bending protection structure, with the advantages of having bending protection structure, solve the problem that flexible circuit board does not have bending protection structure, when using flexible circuit board, flexible circuit board is very easy to damage because of excessive bending, lead to flexible circuit board fracture, lead to flexible circuit board cannot be used.

[0006] To achieve the above object, the utility model provides the following technical scheme: A flexible circuit board with bending protection structure, including flexible circuit board, the top of flexible circuit board is provided with upper limit block, the number of upper limit block is four, the bottom of flexible circuit board is provided with lower limit block of cooperation with upper limit block, the bottom of upper limit block is fixedly connected with recess block, recess block's bottom is through to the bottom of flexible circuit board, the top of lower limit block is fixedly connected with fixed plug of cooperation with recess block, the bottom of lower limit block is fixedly connected with bending protection layer in the inside of lower limit block and at the bottom of flexible circuit board,

[0007] The bending protection layer includes a polyimide sheet at the bottom of the flexible circuit board, a thermoplastic elastomer layer fixedly connected to the bottom of the polyimide sheet, and a thermoplastic polyurethane elastomer layer fixedly connected to the bottom of the thermoplastic elastomer layer.

[0008] As a preferred embodiment of the utility model, the material of the polyimide sheet is a uniform benzene type polyimide film, and the polyimide sheet is fixedly connected to the thermoplastic elastomer layer by glue.

[0009] As a preferred embodiment of the utility model, the type of the thermoplastic elastomer layer is styrene type, and the thickness of the polyimide sheet is 0.2 cm.

[0010] As a preferred embodiment of the utility model, the type of the thermoplastic polyurethane elastomer layer is thermoplastic polyurethane, and the thickness of the polyimide sheet is the same as the thickness of the polyimide sheet.

[0011] As a preferred embodiment of the utility model, the top of the upper limit block is provided with anti-skid lines, and the shape of the anti-skid lines is rhombus.

[0012] As a preferred embodiment of the utility model, the top of the flexible circuit board is fixedly connected to a corrosion-resistant layer, and the material of the corrosion-resistant layer is epoxy resin paint.

[0013] As a preferred embodiment of the utility model, the materials of the upper limit block and the lower limit block are both aluminum alloy, and the shape of the upper limit block is rectangular.

[0014] Compared with the prior art, the utility model has the beneficial effects as follows:

[0015] 1. The utility model first supports the flexible circuit board by the bending protection layer to prevent the flexible circuit board from being excessively bent, and then protects and supports the flexible circuit board by the bending protection layer to achieve the effect of having a bending protection structure.

[0016] 2. The utility model sets the polyimide sheet made of uniform benzene type polyimide film material, which can increase the elasticity of the uniform benzene type polyimide film and make the uniform benzene type polyimide film less likely to bend and deform. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the flexible circuit board structure of this utility model;

[0018] Figure 2 This is a front sectional view of the upper limit block structure of this utility model;

[0019] Figure 3 This is a partial sectional view of the front view of the bending protective layer structure of this utility model;

[0020] Figure 4 This is a partial sectional view of the main view of the flexible circuit board structure of this utility model.

[0021] In the diagram: 1. Flexible circuit board; 2. Upper limit block; 3. Lower limit block; 4. Groove block; 5. Fixing plug; 6. Bending protection layer; 61. Polyimide sheet; 62. Thermoplastic elastomer layer; 63. Thermoplastic polyurethane elastomer layer; 7. Anti-slip texture; 8. Anti-corrosion layer. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figures 1 to 4 As shown, the present invention provides a flexible circuit board with a bending protection structure, including a flexible circuit board 1, an upper limit block 2 is provided on the top of the flexible circuit board 1, the number of upper limit blocks 2 is four, a lower limit block 3 is provided on the bottom of the flexible circuit board 1 to cooperate with the upper limit blocks 2, a groove block 4 is fixedly connected to the bottom of the upper limit block 2, the bottom of the groove block 4 extends through to the bottom of the flexible circuit board 1, a fixing plug 5 is fixedly connected to the top of the lower limit block 3 to cooperate with the groove block 4, and a bending protection layer 6 is fixedly connected to the inner side of the lower limit block 3 and located at the bottom of the flexible circuit board 1.

[0024] The bending protection layer 6 includes a polyimide sheet 61 located at the bottom of the flexible circuit board 1, a thermoplastic elastomer layer 62 fixedly connected to the bottom of the polyimide sheet 61, and a thermoplastic polyurethane elastomer layer 63 fixedly connected to the bottom of the thermoplastic elastomer layer 62.

[0025] refer to Figure 3 The polyimide sheet 61 is made of homopolymer polyimide film, and the polyimide sheet 61 is fixedly connected to the thermoplastic elastomer layer 62 by adhesive.

[0026] As a technical optimization scheme of the utility model, through setting the polyimide sheet 61 of the uniform benzene type polyimide film material, the elasticity of the uniform benzene type polyimide film can be increased, and the uniform benzene type polyimide film is more not easy to bend and deform.

[0027] Reference Figure 3 The type of the thermoplastic elastomer layer 62 is styrene type, and the thickness of the polyimide sheet 61 is zero point two centimeters.

[0028] As a technical optimization scheme of the utility model, through setting the thermoplastic elastomer layer 62 of styrene type, the bending resistance of the flexible circuit board 1 can be increased, and the user is facilitated to use.

[0029] Reference Figure 3 The type of the thermoplastic polyurethane elastomer layer 63 is thermoplastic polyurethane, and the thickness of the polyimide sheet 61 is the same as the thickness of the polyimide sheet 61.

[0030] As a technical optimization scheme of the utility model, through setting the thermoplastic polyurethane elastomer layer 63 of thermoplastic polyurethane, the insulation performance can be provided while bending protection, and the static conduction to the flexible circuit board 1 is prevented.

[0031] Reference Figure 1 The top of the upper limit block 2 is provided with anti-skid lines 7, and the shape of the anti-skid lines 7 is diamond.

[0032] As a technical optimization scheme of the utility model, through setting the anti-skid lines 7, the friction between the hands of the user and the upper limit block 2 can be increased, and the upper limit block 2 is prevented from being dropped when installing the flexible circuit board 1.

[0033] Reference Figure 4 The top of the flexible circuit board 1 is fixedly connected with a corrosion-resistant layer 8, and the material of the corrosion-resistant layer 8 is epoxy resin paint.

[0034] As a technical optimization scheme of the utility model, through setting the corrosion-resistant layer 8, the corrosion resistance of the flexible circuit board 1 can be increased, and the flexible circuit board 1 is prevented from being corroded and damaged.

[0035] Reference Figure 1 The materials of the upper limit block 2 and the lower limit block 3 are both aluminum alloy, and the shape of the upper limit block 2 is rectangular.

[0036] As a technical optimization scheme of the utility model, through setting the aluminum alloy, the strength of the upper limit block 2 and the lower limit block 3 can be increased, and the upper limit block 2 and the lower limit block 3 are more not easy to be damaged.

[0037] The working principle and use process of the utility model: when the flexible circuit board 1 is bent, first, the polyimide sheet 61 is used to support the flexible circuit board 1, prevents the flexible circuit board 1 from being bent too much, at the same time, the thermoplastic elastomer layer 62 is used to support the polyimide sheet 61, prevents the polyimide sheet 61 from being bent too much, finally, the thermoplastic polyurethane elastomer layer 63 is used to support the thermoplastic elastomer layer 62, prevents the thermoplastic elastomer layer 62 from being bent too much, at this time, the bending protection layer 6 can be used to protect and support the flexible circuit board 1, so as to achieve the effect of the bending protection structure.

[0038] In conclusion: the flexible circuit board with bending protection structure, through setting up flexible circuit board 1, upper limit block 2, lower limit block 3, recess block 4, fixed plug 5, bending protection layer 6, polyimide sheet 61, thermoplastic elastomer layer 62, thermoplastic polyurethane elastomer layer 63, solve the problem that the flexible circuit board does not have bending protection structure, when the flexible circuit board is used, the flexible circuit board is very easy to be damaged because of being bent too much, leading to the problem that the flexible circuit board is broken, leading to the problem that the flexible circuit board cannot be used.

[0039] It should be noted that in this text, such as first and second relationship terms only to distinguish one entity or operation from another entity or operation, and does not necessarily require or imply that there is any such actual relationship or order between the entities or operations. Moreover, the term "includes", "contains" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent in such process, method, article or equipment.

[0040] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A flexible wiring board having a bend-prevention structure, comprising a flexible wiring board (1), characterized by: The top of the flexible circuit board (1) is provided with upper limit blocks (2), the number of the upper limit blocks (2) is four, the bottom of the flexible circuit board (1) is provided with lower limit blocks (3) used in cooperation with the upper limit blocks (2), the bottom of the upper limit blocks (2) is fixedly connected with groove blocks (4), the bottom of the groove blocks (4) penetrates to the bottom of the flexible circuit board (1), the top of the lower limit blocks (3) is fixedly connected with fixed plugs (5) used in cooperation with the groove blocks (4), the inner side of the lower limit blocks (3) and located at the bottom of the flexible circuit board (1) is fixedly connected with bending protection layers (6); The bending protection layer (6) comprises a polyimide sheet (61) located at the bottom of the flexible circuit board (1), the bottom of the polyimide sheet (61) is fixedly connected with a thermoplastic elastomer layer (62), and the bottom of the thermoplastic elastomer layer (62) is fixedly connected with a thermoplastic polyurethane elastomer layer (63).

2. The flexible circuit board having a bend protection structure according to claim 1, wherein: The material of the polyimide sheet (61) is a uniform benzene type polyimide film, and the polyimide sheet (61) is fixedly connected with the thermoplastic elastomer layer (62) through glue.

3. The flexible circuit board having a bend protection structure according to claim 1, wherein: The type of the thermoplastic elastomer layer (62) is styrene type, and the thickness of the polyimide sheet (61) is 0.2 cm.

4. The flexible circuit board having a bend-protection structure according to claim 1, wherein: The type of the thermoplastic polyurethane elastomer layer (63) is thermoplastic polyurethane, and the thickness of the polyimide sheet (61) is the same as that of the polyimide sheet (61).

5. The flexible circuit board having a bend-protection structure according to claim 1, wherein: The top of the upper limit block (2) is provided with anti-skid lines (7), and the shape of the anti-skid lines (7) is diamond-shaped.

6. The flexible circuit board having a bend-protection structure according to claim 1, wherein: The top of the flexible circuit board (1) is fixedly connected with a corrosion-resistant layer (8), and the material of the corrosion-resistant layer (8) is epoxy resin paint.

7. The flexible circuit board having a bend-protection structure according to claim 1, wherein: The materials of the upper limit blocks (2) and the lower limit blocks (3) are both aluminum alloy, and the shape of the upper limit blocks (2) is rectangular.

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