Reinforcing steel sheet of flexible circuit board

Abstract

The utility model discloses a reinforcing steel sheet for a flexible circuit board, and relates to the technical field of reinforcing steel sheets. A heat conduction layer is fixedly installed on the top of the circuit board, a reinforcing steel sheet is arranged over the heat conduction layer, a plurality of trapezoid strips distributed at equal intervals are fixedly installed on the top of the heat conduction layer, each trapezoid strip is of a trapezoid rod-shaped structure with the wide upper portion and the narrow lower portion, and trapezoid grooves are formed in the positions, corresponding to the trapezoid strips, of the bottom of the reinforcing steel sheet. According to the utility model, the trapezoidal strip is of the trapezoidal rod-shaped structure with the wide upper part and the narrow lower part, and the internal hollow area of each trapezoidal groove is matched with the trapezoidal strip, so that the reinforcing steel sheet cannot be easily separated from the heat conducting layer, and the sticking components for fixing the reinforcing steel sheet are respectively arranged at the four corners of the top of the reinforcing steel sheet; the bonding assembly is bonded with the circuit board, so that the reinforcing steel sheet can be prevented from moving towards any horizontal direction, the trapezoidal strip is prevented from sliding and separating from the interior of the trapezoidal groove, and the effect of fixing the reinforcing steel sheet is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of reinforcing steel sheets, in particular to a reinforcing steel sheet for a flexible circuit board. Background Art

[0002] Flexible circuit boards are made of polyimide film as the substrate, which can be bent, rolled and folded freely. They are also called soft boards or FPCs in the industry. In some specific scenarios, the mechanical strength and stability of flexible circuit boards may not meet the requirements, so the flexible circuit boards need to be reinforced. Flexible circuit board reinforcement steel sheets can enhance the mechanical strength and stability of the circuit boards, as well as improve the reliability and service life of the circuit boards.

[0003] However, after the existing reinforcing steel sheet is directly pasted to the flexible circuit board with glue, if the pasting is not firm or the glue ages later, it will be very easy to cause the reinforcing steel sheet to fall off the flexible circuit board, thereby affecting the normal use of the flexible circuit board and even shortening the service life of the flexible circuit board. Therefore, a reinforcing steel sheet for a flexible circuit board is proposed. Utility Model Content

[0004] The purpose of the utility model is to solve the problem that after the existing reinforcing steel sheet is directly pasted to the flexible circuit board by glue, if the pasting is not firm or the glue ages later, it will easily cause the reinforcing steel sheet to fall off the flexible circuit board. The utility model provides a flexible circuit board reinforcing steel sheet.

[0005] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical solutions:

[0006] A reinforcing steel sheet for a flexible circuit board comprises a circuit board, a heat conducting layer is fixedly mounted on the top of the circuit board, a reinforcing steel sheet is arranged directly above the heat conducting layer, a plurality of equally spaced trapezoidal bars are fixedly mounted on the top of the heat conducting layer, the trapezoidal bars are trapezoidal rod-shaped structures which are wide at the top and narrow at the bottom, a trapezoidal groove is provided at the bottom of the reinforcing steel sheet corresponding to the position of each trapezoidal bar, the inner hollow area of ​​each trapezoidal groove is matched with the trapezoidal bar, each trapezoidal bar is movably mounted inside the corresponding trapezoidal groove, and adhesive components for fixing the reinforcing steel sheet are respectively arranged at the four corners at the top of the reinforcing steel sheet.

[0007] Furthermore, the pasting component includes four tapes, and the four corners of the top of the reinforcing steel sheet are respectively pasted with tapes, and both ends of the adhesive surface of each tape are pasted with release films.

[0008] Furthermore, a plurality of heat dissipation holes distributed in a rectangular array are provided at the bottom of the reinforcing steel sheet, and a ventilation hole is provided at the top of the heat conducting layer at a position corresponding to each heat dissipation hole.

[0009] Furthermore, both side walls of each trapezoidal bar are provided with a card slot, a card strip is movably installed inside each card slot, each card strip is fixed inside the corresponding trapezoidal slot, and a bar hole is provided on the lower surface of each card strip.

[0010] Furthermore, the bottom of the reinforcing steel sheet is provided with a plurality of equally spaced glue overflow grooves on both sides of each trapezoidal groove, the inner hollow area of ​​each glue overflow groove is connected with the inner part of the adjacent trapezoidal groove, and the inner hollow area of ​​each glue overflow groove is a triangular prism structure which is narrow at the top and wide at the bottom.

[0011] Furthermore, a sealing strip is provided on one side of the heat-conducting layer, and the sealing strip is fixedly connected to the heat-conducting layer and each trapezoidal strip.

[0012] The beneficial effects of the utility model are as follows:

[0013] 1. When fixing the reinforcing steel sheet to the circuit board, the utility model first aligns each trapezoidal bar with each trapezoidal groove, and then pushes each trapezoidal bar into each trapezoidal groove. Since the trapezoidal bar is a trapezoidal rod-shaped structure that is wide at the top and narrow at the bottom, the internal hollow area of ​​each trapezoidal groove is adapted to the trapezoidal bar, so the reinforcing steel sheet will not be easily separated from the heat conductive layer. In addition, since adhesive components for fixing the reinforcing steel sheet are respectively provided at the four corners of the top of the reinforcing steel sheet, the adhesive components are pasted to the circuit board, which can prevent the reinforcing steel sheet from moving in any horizontal direction, so as to prevent the trapezoidal bar from sliding out of the trapezoidal groove, thereby achieving the fixing effect of the reinforcing steel sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0015] Figure 2 This utility model Figure 1 The enlarged view of point A in the middle;

[0016] Figure 3 It is a specific schematic diagram of the reinforcing steel sheet of the utility model;

[0017] Figure 4 This utility model Figure 3 The enlarged view of point B in the middle;

[0018] Figure numerals: 1. Circuit board; 2. Heat-conducting layer; 3. Reinforcing steel sheet; 4. Trapezoidal strip; 5. Trapezoidal groove; 6. Paste assembly; 61. Adhesive tape; 62. Release film; 7. Heat dissipation holes; 8. Air holes; 9. Card slot; 10. Card strip; 11. Strip hole; 12. Glue overflow groove; 13. Sealing strip. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0022] In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They 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.

[0023] like Figures 1 to 4As shown, a reinforcing steel sheet for a flexible circuit board comprises a circuit board 1, a heat-conducting layer 2 is fixedly installed on the top of the circuit board 1, a reinforcing steel sheet 3 is arranged directly above the heat-conducting layer 2, a plurality of equally spaced trapezoidal bars 4 are fixedly installed on the top of the heat-conducting layer 2, the trapezoidal bars 4 are trapezoidal rod-shaped structures that are wide at the top and narrow at the bottom, a trapezoidal groove 5 is provided at the bottom of the reinforcing steel sheet 3 corresponding to the position of each trapezoidal bar 4, the inner hollow area of ​​each trapezoidal groove 5 is adapted to the trapezoidal bar 4, each trapezoidal bar 4 is movably installed in the corresponding trapezoidal groove 5, and adhesive components 6 for fixing the reinforcing steel sheet 3 are respectively arranged at the four corners of the top of the reinforcing steel sheet 3. It should be noted that when the reinforcing steel sheet 3 is fixed When it is placed on the circuit board 1, first align each trapezoidal bar 4 with each trapezoidal groove 5, and then push each trapezoidal bar 4 into each trapezoidal groove 5. Since the trapezoidal bar 4 is a trapezoidal rod-shaped structure that is wide at the top and narrow at the bottom, the internal hollow area of ​​each trapezoidal groove 5 is adapted to the trapezoidal bar 4, so the reinforcing steel sheet 3 will not be easily separated from the thermal conductive layer 2. In addition, since adhesive components 6 for fixing the reinforcing steel sheet 3 are respectively provided at the four corners at the top of the reinforcing steel sheet 3, the adhesive components 6 are pasted to the circuit board 1, which can prevent the reinforcing steel sheet 3 from moving in any horizontal direction, so as to prevent the trapezoidal bar 4 from sliding out of the trapezoidal groove 5, thereby achieving the fixing effect of the reinforcing steel sheet 3.

[0024] like Figure 1 As shown, the pasting component 6 includes four tapes 61, and the four corners of the top of the reinforcing steel sheet 3 are respectively pasted with tapes 61, and both ends of the adhesive surface of each tape 61 are pasted with release films 62. It should be noted that after each trapezoidal strip 4 is pushed into the inside of each trapezoidal groove 5, each release film 62 is torn off from the adhesive surface of the corresponding tape 61, and then both ends of each tape 61 are pasted to the circuit board 1.

[0025] like Figures 1 to 4 As shown, a plurality of heat dissipation holes 7 distributed in a rectangular array are provided at the bottom of the reinforcing steel sheet 3, and an air hole 8 is provided at the top of the thermal conductive layer 2 corresponding to the position of each heat dissipation hole 7. It should be noted that the main purpose of the heat dissipation holes 7 and the air holes 8 is to achieve the heat dissipation effect and prevent the heat from being unable to be diffused in time when the circuit board 1 is used for a long time.

[0026] like Figures 1 to 4As shown, both side walls of each trapezoidal bar 4 are provided with a card slot 9, and a card strip 10 is movably installed inside each card slot 9. Each card strip 10 is fixed inside the corresponding trapezoidal groove 5, and a strip hole 11 is provided on the lower surface of each card strip 10. It should be noted that when each trapezoidal bar 4 is pushed into the inside of each trapezoidal groove 5, each card strip 10 is inserted into the inside of the corresponding card slot 9. The cooperation between the card slot 9 and the card strip 10 can prevent the trapezoidal bar 4 from easily detaching from the inside of the trapezoidal groove 5 when the reinforcing steel sheet 3 is bent. If it is necessary to further strengthen the adhesion stability of the trapezoidal bar 4 inside the trapezoidal groove 5, glue can be filled into the trapezoidal groove 5. The strip hole 11 is mainly used to ensure that the glue contacts each inner wall surface of the trapezoidal groove 5 when glue is filled into the trapezoidal groove 5, thereby ensuring the adhesion stability of the trapezoidal bar 4 and the trapezoidal groove 5.

[0027] like Figure 3 , Figure 4 As shown, the bottom of the reinforcing steel sheet 3 is provided with a plurality of equally spaced glue overflow grooves 12 on both sides of each trapezoidal groove 5, and the internal hollow area of ​​each glue overflow groove 12 is connected with the interior of the adjacent trapezoidal groove 5, and the internal hollow area of ​​each glue overflow groove 12 is a triangular prism structure that is narrow at the top and wide at the bottom. It should be noted that after the trapezoidal groove 5 is filled with glue, when each trapezoidal strip 4 is pushed into the interior of each trapezoidal groove 5, a part of the glue inside each trapezoidal groove 5 will be squeezed into the corresponding glue overflow groove 12, and when the glue inside the glue overflow groove 12 is solidified, the thermal conductive layer 2 and the reinforcing steel sheet 3 can be tightly adhered, and the internal hollow area of ​​each glue overflow groove 12 is a triangular prism structure that is narrow at the top and wide at the bottom, which can increase the bonding area between the glue and the thermal conductive layer 2.

[0028] like Figure 1 As shown, a sealing strip 13 is provided on one side of the heat-conducting layer 2, and the sealing strip 13 is fixedly connected to the heat-conducting layer 2 and each trapezoidal strip 4. It should be noted that if glue is filled into the trapezoidal groove 5, when each trapezoidal strip 4 is pushed into the inside of each trapezoidal groove 5, a part of the glue overflowing from the inside of each trapezoidal groove 5 can adhere the sealing strip 13 to the contact area of ​​the reinforcing steel sheet 3, which can not only enhance the adhesion stability of the heat-conducting layer 2 and the reinforcing steel sheet 3, but also prevent the trapezoidal strip 4 from sliding out of the trapezoidal groove 5, thereby achieving the fixing effect of the reinforcing steel sheet 3.

[0029] In summary:

[0030] When fixing the reinforcing steel sheet 3 to the circuit board 1, first align each trapezoidal bar 4 with each trapezoidal groove 5, and then push each trapezoidal bar 4 into each trapezoidal groove 5. Since the trapezoidal bar 4 is a trapezoidal rod-shaped structure that is wide at the top and narrow at the bottom, the internal hollow area of ​​each trapezoidal groove 5 is adapted to the trapezoidal bar 4, so the reinforcing steel sheet 3 will not be easily separated from the thermal conductive layer 2. In addition, since adhesive components 6 for fixing the reinforcing steel sheet 3 are respectively provided at the four corners at the top of the reinforcing steel sheet 3, the adhesive components 6 are pasted to the circuit board 1, which can prevent the reinforcing steel sheet 3 from moving in any horizontal direction, so as to prevent the trapezoidal bar 4 from sliding out of the trapezoidal groove 5, thereby achieving the fixing effect of the reinforcing steel sheet 3.

[0031] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the specification only describe the principles of the utility model. The utility model may be subject to various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A flexible circuit board reinforcement steel sheet, characterized in that: The invention comprises a circuit board (1), a heat conducting layer (2) is fixedly mounted on the top of the circuit board (1), a reinforcing steel sheet (3) is arranged directly above the heat conducting layer (2), a plurality of equally spaced trapezoidal bars (4) are fixedly mounted on the top of the heat conducting layer (2), the trapezoidal bars (4) are trapezoidal rod-shaped structures which are wide at the top and narrow at the bottom, a trapezoidal groove (5) is provided at the bottom of the reinforcing steel sheet (3) at a position corresponding to each trapezoidal bar (4), the inner hollow area of ​​each trapezoidal groove (5) is adapted to the trapezoidal bar (4), each trapezoidal bar (4) is movably mounted inside the corresponding trapezoidal groove (5), and adhesive components (6) for fixing the reinforcing steel sheet (3) are respectively arranged at the four corners at the top of the reinforcing steel sheet (3).

2. A flexible circuit board reinforcing steel sheet according to claim 1, characterized in that: The pasting assembly (6) comprises four adhesive tapes (61), and the adhesive tapes (61) are respectively pasted at the four corners of the top of the reinforcing steel sheet (3), and release films (62) are pasted on both ends of the adhesive surface of each adhesive tape (61).

3. A flexible circuit board reinforcing steel sheet according to claim 1, characterized in that: The bottom of the reinforcing steel sheet (3) is provided with a plurality of heat dissipation holes (7) distributed in a rectangular array, and the top of the heat conducting layer (2) is provided with air holes (8) at positions corresponding to each heat dissipation hole (7).

4. The flexible circuit board reinforcing steel sheet according to claim 1, characterized in that: Both side walls of each trapezoidal bar (4) are provided with a clamping groove (9), each clamping groove (9) is internally provided with a clamping strip (10) movably mounted, each clamping strip (10) is fixed inside a corresponding trapezoidal groove (5), and a bar-shaped hole (11) is provided on the lower surface of each clamping strip (10).

5. The flexible circuit board reinforcing steel sheet according to claim 1, characterized in that: The bottom of the reinforcing steel sheet (3) is provided with a plurality of equally spaced glue overflow grooves (12) on both sides of each trapezoidal groove (5), the inner hollow area of ​​each glue overflow groove (12) is connected to the inner part of the adjacent trapezoidal groove (5), and the inner hollow area of ​​each glue overflow groove (12) is a triangular prism structure that is narrow at the top and wide at the bottom.

6. The flexible circuit board reinforcing steel sheet according to claim 1, characterized in that: A sealing strip (13) is provided on one side of the heat-conducting layer (2), and the sealing strip (13) is fixedly connected to the heat-conducting layer (2) and each trapezoidal strip (4).

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