Hollow thickness-adjustable FPC reinforcing sheet

Abstract

The invention discloses a hollow thickness-adjustable FPC reinforcing sheet, which comprises a reinforcing plate base layer and a reinforcing plate surface layer, one side surface of the reinforcing plate base layer is provided with a plurality of supporting blocks, at least one clamping column and a conical convex part, the reinforcing plate surface layer is provided with a through hole, the reinforcing plate surface layer is provided with a butt joint insertion hole corresponding to the clamping column, and the through hole is provided with a through hole corresponding to the clamping column. And the lug bosses are buckled with the butt joint insertion holes in a matching manner. With the adoption of the structure, the two layers can realize adjustment of a plurality of intervals or buckling connection with one high side and one low side, so that adjustment of a plurality of thickness dimensions or adjustment of different thickness dimensions at different positions of the same reinforcing sheet can be realized, and the reinforcing plate base layer and the reinforcing plate surface layer are separated by the supporting blocks or the interval between the reinforcing plate base layer and the reinforcing plate surface layer can be adjusted to form the hollow layer; and the through holes in the surface layer of the reinforcing plate are matched, so that the overall heat dissipation area of the reinforcing sheet can be effectively increased, and the reinforcing sheet is simple in structure, very flexible and practical.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of FPC circuit board reinforcing sheet, in particular to a hollow and thickness-adjustable reinforcing sheet for FPC. BACKGROUND

[0002] In compact electronic products, FPC is the abbreviation of flexible circuit board, which can realize three-dimensional space wiring with flexibility. In order to protect the structural strength of the key parts and prevent bending and breaking, a reinforcing sheet is usually configured. The FR4 material reinforcing sheet becomes one of the main materials for reinforcing sheet because of its excellent electrical insulation, high mechanical strength, low cost and similar thermal expansion coefficient to PCB circuit board.

[0003] However, the existing FR4 reinforcing sheet has two core pain points: first, the thickness is fixed and single, which cannot meet the temporary adjustment requirement of the thickness of the supporting area during the assembly of different models of products, and it is also difficult to adapt to the different thickness requirements of different positions of the same FPC reinforcing sheet; second, the thick core of the reinforcing sheet will hinder the heat dissipation of the FPC circuit and components, which may affect the heat dissipation efficiency and operation stability of the equipment. Therefore, a reinforcing sheet with adjustable thickness and effective heat dissipation function is needed to meet the use requirements of flexible circuit board. SUMMARY

[0004] To solve the problems raised in the background art, the technical solution adopted by the present application is: a hollow and thickness-adjustable FPC reinforcing sheet, comprising a reinforcing plate base layer and a reinforcing plate surface layer, a plurality of supporting blocks and at least one clamping column are arranged on one side of the reinforcing plate base layer, a through hole is arranged on the reinforcing plate surface layer, a corresponding clamping hole is arranged on the reinforcing plate surface layer corresponding to the clamping column, at least one tapered protruding part is arranged on the upper end of the clamping column, and the protruding part is matched and buckled with the clamping hole.

[0005] As a preferred technical solution of the present application, a plurality of through holes are arranged, and the plurality of through holes are uniformly distributed on the reinforcing plate surface layer.

[0006] As a preferred technical solution of the present application, an adhesive film is attached and bonded to the bottom end of the reinforcing plate base layer, and a release film is attached to the side opposite to the reinforcing plate base layer.

[0007] As a preferred technical solution of the present application, a fixing hole is arranged at the corner of the reinforcing plate base layer, the reinforcing plate surface layer and the adhesive film, and the reinforcing plate surface layer is attached and bonded to one end of the FPC circuit board through the adhesive film.

[0008] As a preferred technical solution of the present application, the supporting block is a right triangular prism structure.

[0009] As a preferred technical scheme of the present application, the diameter of the through hole is 0.02mm-0.05mm, the height of the supporting block is 0.2mm-0.4mm, and the thickness of the base layer and the surface layer of the reinforcing plate is 0.2mm-1mm.

[0010] The base layer and the surface layer of the reinforcing plate are formed of FR4 material.

[0011] As a preferred technical scheme of the present application, the thickness of the adhesive film is 0.1mm-0.3mm, and the adhesive film is made of thermosetting epoxy material.

[0012] The shape of the reinforcing sheet can be square, circular, polygonal or special-shaped.

[0013] The present application has the following advantages: by using the structure, at least one clamping column is fixedly connected to the side of the base layer of the reinforcing plate opposite to the surface layer of the reinforcing plate, a tapered protruding portion is arranged at the upper end of the clamping column, and a butt joint socket is arranged in the surface layer of the reinforcing plate opposite to the clamping column, so that multiple spacing adjustments or buckling with one side high and the other side low can be realized between the two layers to realize the adjustment of multiple thickness sizes or different thickness sizes at different positions of the same reinforcing sheet, and a hollow layer is formed between the base layer of the reinforcing plate and the surface layer of the reinforcing plate through the supporting block with adjustable spacing, so that the heat dissipation space is increased, the space layer at a certain distance is also a kind of elastic structure for further improving the compression resistance or torsion resistance, and the through hole on the surface layer of the reinforcing plate can effectively increase the heat dissipation area of the reinforcing sheet as a whole, so that the structure is simple, flexible and practical. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a form of the overall structure of the present application, referring to the drawings;

[0015] Figure 2 is a structure of the present application Figure 1 a split structure diagram of the structure;

[0016] Figure 3 is Figure 2 an enlarged view of part A;

[0017] Figure 4 a form of the present application structure pasted on the FPC circuit board, referring to the schematic diagram.

[0018] Marked: 1, the base layer of the reinforcing plate; 101, the clamping column; 2, the surface layer of the reinforcing plate; 201, the butt joint socket; 3, the through hole; 4, the supporting block; 5, the hollow layer; 6, the adhesive film; 7, the release film; 8, the fixing hole; 9, the FPC circuit board. DETAILED DESCRIPTION

[0019] The technical solution of the present invention will now be clearly and completely described in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, 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, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] The invention will now be further described with reference to the accompanying drawings.

[0022] Please refer to the following: Figures 1-4 This invention discloses a hollow and adjustable-thickness FPC reinforcing sheet, comprising a reinforcing plate base layer 1 and a reinforcing plate surface layer 2. The reinforcing plate base layer 1 has several support blocks 4 and at least one locking post 101 on one side. The reinforcing plate surface layer 2 has through holes 3 and corresponding insertion holes 201 for the locking posts 101. The upper end of each locking post 101 has at least one conical protrusion (see attached diagram). Figure 3 (Only one conical protrusion is shown), the protrusion matches and engages with the docking hole 201, and the height of the conical protrusion on the locking post 101 is higher than or equal to the height of the support block 4;

[0023] It can achieve multiple spacing adjustments for fastening or two-layer fastening with one side higher than the other, so as to realize multiple thickness dimensions or different positions of the same reinforcing piece thickness dimension adjustment, which is very flexible in application.

[0024] The base layer 1 and the surface layer 2 of the reinforcing plate are fixed together by snap-fit ​​fasteners to form different intervals, or are separated by support blocks 4 to form a hollow layer 5. This increases the heat dissipation space and forms the overall heat dissipation area of ​​the reinforcing plate.

[0025] The reinforcing plate base layer 1 and the reinforcing plate surface layer 2 are fixed by the buckle connection of the buckling buckle to form different intervals or are separated by the supporting block 4 to form a hollow layer 5, and the space layer at a certain distance is also a kind of elastic structure for further improving the compression resistance or torsion resistance.

[0026] Further refinement, as shown in Figure 2 , 3 The card column 101 is located in the middle of the four edges of the reinforcing plate base layer 1, providing stable connection of the four edges, and the upper end of the card column 101 is provided with at least one tapered protruding part (equivalent to a barb structure), which is matched with the butt plug hole 201 for buckling connection. After the tapered protruding part at the upper end of the card column 101 is inserted into the butt plug hole 201, a stable insertion buckling fixing effect is achieved due to the extrusion. The tapered protruding part can also be provided at different heights on the upper end of the card column 101, that is, several are provided at different heights, so that different heights can be selected during application, and multiple thickness size adjustments can be realized. Or the buckling requirement of one side high and one side low.

[0027] The shape of the reinforcing sheet can be square, circular or polygonal or special-shaped, and the drawings show a square shape.

[0028] The reinforcing plate base layer 1 and the reinforcing plate surface layer 2 are integrally formed of FR4 material.

[0029] The above structure is also a heat dissipation structure or an adjustable structure of the FPC reinforcing sheet.

[0030] The number of through holes 3 is several, and the several through holes 3 are uniformly distributed on the reinforcing plate surface layer 2. The bottom end of the reinforcing plate base layer 1 is attached and bonded with a glue film 6, and the glue film 6 is attached with a release film 7 on the side opposite to the reinforcing plate base layer 1. The thickness of the glue film 6 is 0.1mm-0.3mm, and the glue film 6 is made of thermosetting epoxy film material or pressure-sensitive material. The reinforcing plate base layer 1, the reinforcing plate surface layer 2 and the glue film 6 are provided with fixing holes 8 at the corners, which can be used to further strengthen the fixing of the reinforcing sheet and the FPC circuit board. This is optional according to the needs. The reinforcing plate surface layer 2 is attached and bonded to one end of the FPC circuit board 9 through the glue film 6. The number of supporting blocks 4 is several, and the several supporting blocks 4 are uniformly distributed between the reinforcing plate surface layer 2 and the reinforcing plate base layer 1. The supporting block 4 is a right triangular prism structure, which further ensures the stability of the supporting structure of the supporting block 4. The diameter of the through hole 3 is 0.02mm-0.05mm, the height of the supporting block 4 is 0.2mm-0.4mm, and the thickness of the reinforcing plate base layer 1 and the reinforcing plate surface layer 2 is 0.2mm-1mm. Through the glue film 6, it is convenient to use without needing to apply glue on the FPC circuit board 9 or the reinforcing sheet, which further improves the positioning use.

[0031] In the process of mounting and positioning, the release film 7 is torn off first, the reinforcing sheet with the adhesive film 6 is accurately aligned and mounted on the FPC circuit board 9 in the area that needs to be reinforced, then a certain pressure and heat are applied to make the adhesive film 6 solidify, thereby completing the installation of the reinforcing sheet. The heat generated by the FPC circuit board 9 in use will first be transmitted to the reinforcing plate base layer 1 of the reinforcing sheet, and then the heat of the reinforcing plate base layer 1 will be dissipated outward through the hollow layer 5 and the through holes 3 on the reinforcing plate surface layer 2.

[0032] The above structure can fully achieve:

[0033] 1) Hollow and adjustable spacing and thickness of the reinforcing sheet: the overall thickness of the reinforcing sheet can be adjusted in multiple gears through the matching and buckling of the different height tapered protruding parts on the clamping column and the counterplug. For example, when buckled to the first tapered protruding part, the thickness is the basic thickness, and when further inserted by applying force downward, the reinforcing plate base layer and the surface layer are buckled to the lower tapered protruding part, the spacing between the reinforcing plate base layer and the surface layer is reduced, and the thickness is adjusted accordingly. At the same time, by buckling the clamping column at different positions in different gears, the thickness requirement of the same reinforcing sheet being high on one side and low on the other side can be met, which is suitable for the reinforcing requirement of different heights at the same position of the FPC circuit board.

[0034] 2) Effective heat dissipation: first, the hollow layer formed by the supporting blocks or the spacing avoids the heat dissipation blockage of the existing solid structure; second, the through holes uniformly distributed on the reinforcing plate surface layer greatly increase the heat dissipation area, so that the heat generated by the FPC circuit or components can be dissipated through the reinforcing sheet.

[0035] 3) The reinforcing plate base layer 1 and the reinforcing plate surface layer 2 are fixed by the buckling of the clamping buckle to form different spacing or are separated by the supporting blocks 4 to form the hollow layer 5 and the space layer at a certain distance, which is also a kind of elastic structure that further improves the pressure resistance or torsion resistance.

[0036] 4) By adding a prefabricated adhesive film to the reinforcing sheet, the positioning of the reinforcing sheet to the FPC circuit board can be quickly and accurately completed.

[0037] With one reinforcing sheet, multiple functions such as adjustable thickness, different position thickness, hollow space in different heat dissipation areas, further improved pressure resistance and torsion resistance, and convenient positioning can be achieved, which is very flexible and practical. Through sample detection and use, the application, heat dissipation, and torsion resistance of the FR4 reinforcing sheet product in the field of FPC circuit board are improved by a certain percentage compared with the existing technology.

[0038] The above is only a preferred embodiment of the present application, and it should be noted that for ordinary skilled persons in the technical field, some improvements and refinements can be made without departing from the principles of the present application, and these improvements and refinements should also be considered within the protection scope of the present application.

[0039] Other parts of the present application not described in detail are all prior art, so here is not described.

[0040] Finally, it should be noted that: the above examples are used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A hollow FPC reinforcing sheet with adjustable thickness, characterized in that, The device includes a reinforcing plate base layer (1) and a reinforcing plate surface layer (2). The reinforcing plate base layer (1) has several support blocks (4) and at least one locking post (101) on one side. The reinforcing plate surface layer (2) has through holes (3) and corresponding locking posts (101) have mating holes (201). The upper end of the locking post (101) has at least one tapered protrusion, which matches and engages with the mating hole (201).

2. The hollow and adjustable-thickness FPC reinforcing sheet as described in claim 1, characterized in that, The height of the conical protrusion on the pin (101) is higher than or equal to the height of the support block (4).

3. The hollow and adjustable-thickness FPC reinforcing sheet as described in claim 1, characterized in that, The number of through holes (3) is set to a certain number, and the through holes (3) are evenly distributed on the surface layer (2) of the reinforcing plate.

4. The hollow and adjustable-thickness FPC reinforcing sheet as described in claim 1, characterized in that, The bottom end of the reinforcing plate base layer (1) is bonded with an adhesive film (6), and a release film (7) is bonded to the side opposite to the reinforcing plate base layer (1) of the adhesive film (6).

5. A hollow and adjustable-thickness FPC reinforcing sheet as described in claim 1, characterized in that, Fixing holes (8) are provided at the corners of the reinforcing plate base layer (1), the reinforcing plate surface layer (2) and the adhesive film (6). The reinforcing plate surface layer (2) is bonded to one end of the FPC circuit board (9) through the adhesive film (6).

6. The hollow and adjustable-thickness FPC reinforcing sheet as described in claim 1, characterized in that, The support block (4) is a regular triangular prism structure.

7. A hollow and adjustable-thickness FPC reinforcing sheet as described in claim 2, characterized in that, The diameter of the through hole (3) is 0.02mm-0.05mm, the height of the support block (4) is 0.2mm-0.4mm, and the thickness of the base layer (1) and the surface layer (2) of the reinforcing plate is 0.2mm-1mm.

8. A hollow and adjustable-thickness FPC reinforcing sheet as described in claim 4, characterized in that, The thickness of the adhesive film (6) is 0.1mm-0.3mm, and the adhesive film (6) is a thermosetting epoxy film material.

9. A hollow and adjustable-thickness FPC reinforcing sheet as described in claim 1, characterized in that, The overall reinforcing plate can be square, round, or polygonal in shape.

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