CN113473705B

CN113473705B - Circuit board capable of being folded at will

Info

Publication number: CN113473705B
Application number: CN202110805745.5A
Authority: CN
Inventors: 黄铭宏
Original assignee: Dynamic Electronics Kunshan Co ltd
Current assignee: Dynamic Electronics Kunshan Co ltd
Priority date: 2021-07-16
Filing date: 2021-07-16
Publication date: 2022-02-15
Anticipated expiration: 2041-07-16
Also published as: CN113473705A

Abstract

The invention discloses a circuit board capable of being folded at will, which comprises: the PCB comprises a PCB hard board single piece and a PCB soft board, wherein the PCB hard board single piece is square and is provided with a first surface and a second surface which are opposite; the first surface and the second surface are both provided with wire arranging grooves for connecting the midpoints of two adjacent sides; when the PCB hard board single sheets are aligned with the adjacent PCB hard board single sheets, the wire arranging grooves on the two PCB hard board single sheets are communicated and used for arranging the PCB soft board, and two ends of the PCB soft board are respectively and fixedly arranged in the wire arranging grooves on the opposite surfaces of the adjacent PCB hard board single sheets so as to connect the PCB hard board single sheets; four PCB soft boards are arranged between two adjacent PCB hard board single pieces; the rotation angle of the two adjacent PCB hard board single sheets does not exceed 180 degrees; the PCB hard board single sheets are sequentially connected and connected end to end, so that each PCB hard board single sheet is connected with two adjacent PCB hard board single sheets to form a closed annular PCB hard board belt.

Description

Circuit board capable of being folded at will

Technical Field

The invention relates to the technical field of circuit boards, in particular to a circuit board capable of being folded at will.

Background

A Printed Circuit Board (PCB) is an important electronic component, a support for an electronic component, and a carrier for electrical connection of the electronic component. At present, with the rapid development of the PCB industry, the application of the PCB industry is more and more extensive, and as long as electronic components of integrated circuits are provided, the PCB is used for electrical interconnection between the electronic components. However, as the number of devices increases, a larger area is required for arranging the devices, the devices are arranged on only one surface of the PCB, the size of the PCB is required to be larger, a large amount of horizontal space is occupied, and the welding warpage is large, which is not favorable for production. On the other hand, the existing electric appliances are increasingly required to be small in size and exquisite, and the requirements for the space inside the electric appliances are increasingly strict, so that the traditional planar circuit board is difficult to meet the increasingly high design requirements.

Disclosure of Invention

The invention aims to provide a circuit board capable of being folded at will.

In order to achieve the above object, the present invention employs the following:

a circuit board that is arbitrarily foldable, comprising: a single PCB hard board and a soft PCB,

the PCB hard board single piece is square and is provided with a first surface and a second surface which are opposite; the first surface and the second surface are both provided with wire arranging grooves for connecting the midpoints of two adjacent sides;

when the PCB hard board single sheets are aligned with the adjacent PCB hard board single sheets, the wire arranging grooves on the two PCB hard board single sheets are communicated and used for arranging the PCB soft board, and two ends of the PCB soft board are respectively and fixedly arranged in the wire arranging grooves on the opposite surfaces of the adjacent PCB hard board single sheets so as to connect the PCB hard board single sheets;

four PCB soft boards are arranged between two adjacent PCB hard board single pieces; the rotation angle of the two adjacent PCB hard board single sheets does not exceed 180 degrees;

the PCB hard board single sheets are sequentially connected and connected end to end, so that each PCB hard board single sheet is connected with two adjacent PCB hard board single sheets to form a closed annular PCB hard board strip, and multiple schemes are folded.

Preferably, a conductor silver paste layer is printed in the wiring groove on the surface of the single PCB hard board sheet and is contacted with the PCB soft board; and adding resistance paste on the PCB soft board, sintering at 865 ℃, and covering the thin film layer.

Preferably, the four side central side walls of the single PCB hard board are provided with rubber cushion pieces, and each PCB soft board penetrates through the rubber cushion pieces.

Preferably, the first surface and the second surface of the PCB hard board single piece are provided with the bonding pads.

Preferably, the PCB hard board single sheet and the PCB soft board are fixed in a sintering solidification mode after being covered by liquid.

Preferably, the width of the PCB flexible board is less than half of the width of the bus cable slot.

Preferably, the first surface and the second surface of the PCB hard board single piece are printed with electrode marks.

Preferably, the thin film layer is a film resistor, the thin film layer has a film thickness of 5 to 10 μm, and the material of the thin film layer is a resistor paste formed by mixing glass and conductive particles.

Preferably, the flexible PCB adopts polyimide or polyester film as a substrate.

Preferably, the single PCB hard board adopts a phenolic paper laminated board, an epoxy paper laminated board or a polyester glass felt laminated board as a base material.

The invention has the following advantages:

this application is through cutting apart into individual monolithic with PCB to utilize the PCB soft board to connect, thereby can make PCB reach multiple deformation effect, and then satisfy the inside space demand of electrical part, hold more electrical components simultaneously, improve the electrical apparatus performance.

Drawings

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a circuit board PCB hard board single sheet capable of being folded arbitrarily in the invention.

FIG. 2 is a schematic structural diagram of the middle point of the side edge of a single hard board of the PCB capable of being folded arbitrarily.

Fig. 3 is a schematic structural diagram of a single hard board of the circuit board PCB with a foldable freely, which contains a rubber cushion part.

Fig. 4 is a cross-sectional view of a diagonal line of a single piece of the arbitrarily foldable circuit board PCB of the present invention.

Fig. 5 is a cross-sectional view of a disposable folding circuit board PCB single piece wiring groove of the present invention.

Fig. 6 is a schematic structural diagram of a first folding mode of the arbitrarily foldable circuit board of the present invention.

Fig. 7 is a schematic structural diagram of a second folding mode of the arbitrarily foldable circuit board of the present invention.

Fig. 8 is a schematic structural diagram of a third folding mode of the arbitrarily foldable circuit board of the present invention.

Fig. 9 is a schematic structural diagram of a fourth folding mode of the arbitrarily foldable circuit board of the present invention.

Fig. 10 is a schematic structural diagram of a fifth folding mode of the arbitrarily foldable circuit board of the present invention.

In the figures, the various reference numbers are:

1-PCB hard board single sheet, 2-PCB soft board, 3-wiring groove, 4-conductor silver paste layer, 5-resistance paste, 6-thin film layer, 7-rubber pad, 8-bonding pad, and 9-electrode mark.

Detailed Description

In order to more clearly illustrate the invention, the invention is further described below in connection with preferred embodiments. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can, for example, be fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 to 10, a circuit board which can be arbitrarily folded includes: a PCB hard board single sheet 1 and a PCB soft board 2,

the PCB hard board single sheet 1 is square and is provided with a first surface and a second surface which are opposite; the first surface and the second surface are both provided with wire arranging grooves 3 connecting the midpoints of two adjacent sides; the width of the PCB flexible board 2 is less than one half of the width of the wiring groove 3;

it should be noted that the rigid PCB usually uses phenolic paper laminated board, epoxy paper laminated board or polyester glass felt laminated board as the substrate, which is required to support the electrical device, so that the rigid PCB has strong hardness and cannot be bent, and the flexible PCB uses polyimide or polyester film as the substrate, belongs to a flexible material, is usually used for transitional connection parts, and can be bent at will.

When the PCB hard board single sheets 1 are aligned with the adjacent PCB hard board single sheets 1, the wire arranging grooves 3 on the two PCB hard board single sheets 1 are communicated and used for arranging the PCB soft boards 2, and two ends of each PCB soft board 2 are fixedly arranged in the wire arranging grooves 3 on the opposite surfaces of the adjacent PCB hard board single sheets 1 respectively, so that the PCB hard board single sheets 1 are connected; a conductor silver paste layer 4 is printed in a wire arranging groove 3 on the surface of the PCB hard board single sheet 1 and is contacted with the PCB soft board 2; and adding resistance paste 5 on the PCB soft board 2, sintering at 865 ℃, and covering the thin film layer 6. The central side walls of four sides of the PCB hard board single sheet 1 are provided with rubber cushion pieces 7, and each PCB soft board 2 penetrates through the rubber cushion pieces 7. The first surface and the second surface of the PCB hard board single sheet 1 are provided with bonding pads 8. And after the PCB hard board single sheet 1 and the PCB soft board 2 are covered by liquid, the PCB hard board single sheet and the PCB soft board are fixed in a sintering solidification mode. That is, in the present application, the resistor paste is coated and then sintered to be molded.

The thin film layer 6 is a film type resistor, the film thickness of the thin film layer is 5-10 mu m, and the thin film layer is made of resistor glue formed by mixing glass and conductive particles. The film resistor process can be controlled below 400 ℃, the film components are easy to control, the Temperature Coefficient of Resistance (TCR) is stable, and the uniformity of the thickness can be controlled below 5%.

Because each PCB hard board single piece is connected with two adjacent PCB hard board single pieces, each wiring groove can accommodate at least two PCB soft boards.

Four PCB soft boards 2 are arranged between two adjacent PCB hard board single sheets 1; the rotation angle of two adjacent PCB hard board single sheets 1 is not more than 180 degrees;

the length of each PCB soft board 2 between the two PCB hard board single pieces 1 needs to be larger than the thickness of the four PCB hard board single pieces, and the folding thickness requirement of the PCB hard board single pieces can be met by the PCB soft board during folding.

The PCB hard board single sheets 1 are sequentially connected and connected end to end, so that each PCB hard board single sheet 1 is connected with two adjacent PCB hard board single sheets 1 to form a closed annular PCB hard board strip, and various schemes are folded. .

Further, the first surface and the second surface of the PCB hard board single sheet 1 are printed with electrode marks 9.

Taking eight PCB hard board single pieces as an example, the eight PCB hard board single pieces are arranged into two rows and four columns. Four single PCB boards in each row are connected in the manner, the first column and the fourth column are connected in the manner, eight single PCB boards form a closed annular structure, and the eight single PCB boards can be folded into circuit boards suitable for various shells through manual folding. The application does not limit the connection mode among the multiple PCB hard board single sheets, the specific number of the PCB hard boards and the number of the electric devices arranged on each PCB hard board, and the technical personnel in the field can set the PCB hard boards as required, and the PCB hard boards are all within the protection range of the application.

It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.

Claims

1. A circuit board that can fold wantonly, its characterized in that includes: a PCB hard board single sheet (1) and a PCB soft board (2),

the PCB hard board single piece (1) is square and is provided with a first surface and a second surface which are opposite; the first surface and the second surface are both provided with wiring grooves (3) for connecting the midpoints of two adjacent sides;

when the PCB hard board single sheets (1) are aligned with the adjacent PCB hard board single sheets (1), the wire arranging grooves on the two PCB hard board single sheets are communicated and used for arranging the PCB soft board (2), and two ends of the PCB soft board (2) are respectively and fixedly arranged in the wire arranging grooves on the opposite surfaces of the adjacent PCB hard board single sheets to connect the PCB hard board single sheets;

the PCB hard board single sheets are sequentially connected and connected end to end, so that each PCB hard board single sheet is connected with two adjacent PCB hard board single sheets to form a closed annular PCB hard board belt.

2. The arbitrarily foldable circuit board of claim 1, characterized in that the conductor silver paste layer (4) is printed in the wiring groove on the surface of the PCB hard board single sheet (1) and contacts with the PCB soft board (2); and adding resistance paste (5) on the PCB soft board (2), sintering at 865 ℃ and covering the thin film layer (6).

3. A foldable circuit board according to claim 2, characterized in that the central side walls of four sides of the PCB single hard board (1) are provided with rubber pad members (7), and each PCB soft board (2) penetrates through the rubber pad members (7).

4. A disposable folding circuit board according to any of claims 1-3, characterized in that the first and second surfaces of the PCB single rigid board (1) are provided with pads (8).

5. A foldable circuit board according to any of claims 1-3, characterized in that the hard PCB single sheet (1) and the soft PCB (2) are fixed by means of sintering and solidifying after being covered with liquid.

6. A disposable folding circuit board according to claim 1, characterized in that the width of the PCB flexible board (2) is less than half of the width of the bus duct (3).

7. A disposable folding circuit board according to any of claims 1-3, characterized in that the first and second surfaces of the single PCB rigid board (1) are printed with electrode marks (9).

8. The foldable wiring board of claim 2, wherein the thin film layer (6) is a film resistor, the thin film layer has a thickness of 5-10 μm, and the thin film layer is made of a resistor paste formed by mixing glass and conductive particles.

9. The foldable circuit board of claim 1, wherein the flexible PCB (2) is made of polyimide or polyester film.

10. The foldable circuit board of claim 1, wherein the single PCB (1) is made of phenolic paper laminated board, epoxy paper laminated board or polyester glass felt laminated board.