Grounded flexible wiring board

Abstract

The utility model discloses a kind of flexible circuit boards of grounding, including by upper and lower sequentially arranged upper layer PET, upper layer circuit, upper layer insulation UV, upper layer jump silver, upper layer waterproof adhesive, middle layer PET, lower layer waterproof adhesive, lower layer jump silver, lower layer insulation UV, lower layer circuit and lower layer PET;Upper layer PET is also printed with ground wire and at least one ground wire silver dot communicated with the ground wire, when flexible circuit board is assembled with button device together, the ground wire silver dot is directly or indirectly contacted with the conductive plate in button device without again external ground wire and is grounded, so that static electricity is led away by conductive plate, to realize grounding, prevent the influence of the static electricity released instantaneously when human body contacts computer keyboard to the electronic component inside keyboard, to cause button to malfunction.

Description

Technical Field

[0001] This utility model relates to the field of flexible circuit board technology, and in particular to a grounded flexible circuit board. Background Technology

[0002] Flexible printed circuit boards are mainly used in home appliance buttons, computer buttons, and various button functions. They achieve electrical functions by printing conductive silver paste, insulating UV, carbon, and waterproof adhesive onto PET.

[0003] Existing flexible printed circuit boards (FPCBs) mainly consist of eleven parts: upper PET layer, upper circuitry, upper UV insulation layer, upper silver jumper layer, upper waterproof adhesive layer, middle PET layer, lower waterproof adhesive layer, lower silver jumper layer, lower UV insulation layer, lower circuitry, and lower PET layer. The upper PET layer, upper circuitry, upper UV insulation layer, upper silver jumper layer, and upper waterproof adhesive layer combine to form the upper trace, while the lower waterproof adhesive layer, lower silver jumper layer, lower UV insulation layer, lower circuitry, and lower PET layer combine to form the lower trace. Typically, the FPCB manufacturing process involves conventionally assembling the upper trace and the lower trace, followed by applying a protective film to the output terminals of the lower circuitry. Finally, the upper trace, middle PET layer, and lower trace are combined to achieve the overall assembly of the flexible printed circuit board.

[0004] The flexible circuit board with the above structure is assembled into the keyboard. However, during actual use, the static electricity released when a person touches the computer keyboard can affect the electronic components inside the keyboard, causing the keys to malfunction. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a grounded flexible circuit board, which includes, from top to bottom, an upper PET layer, an upper circuit layer, an upper insulating UV layer, an upper silver jumper layer, an upper waterproof adhesive layer, a middle PET layer, a lower waterproof adhesive layer, a lower silver jumper layer, a lower insulating UV layer, a lower circuit layer, and a lower PET layer. The upper layer circuit, upper layer UV insulation, upper layer silver stripe and upper layer waterproof adhesive are sequentially printed on the upper layer PET; The lower layer circuitry, lower layer UV insulation, lower layer silver foil, and lower layer waterproof adhesive are sequentially printed on the lower layer PET. The upper PET layer is also printed with a ground wire and at least one ground wire silver point connected to the ground wire. When the flexible circuit board is assembled with the key device, the ground wire silver point contacts the conductive plate inside the key device, so that the static electricity is conducted away by the conductive plate, thereby achieving grounding and preventing the static electricity released instantaneously when the human body touches the computer keyboard from affecting the electronic components inside the keyboard, thereby causing the keys to malfunction.

[0006] The surface of the grounding silver point is printed with a layer of carbon ink, which can protect the grounding silver point and improve the oxidation resistance of the grounding wire. When the flexible circuit board is assembled with the key device, the carbon ink comes into contact with the conductive plate inside the key device, so that the static electricity is conducted away by the conductive plate, thereby achieving grounding and preventing the static electricity released instantaneously when the human body touches the computer keyboard from affecting the electronic components inside the keyboard and causing the keys to malfunction.

[0007] Furthermore, the surface of the carbon ink is coated with conductive adhesive. When the flexible circuit board is assembled with the keypad, the conductive adhesive comes into contact with the conductive plate inside the keypad, causing static electricity to be conducted away by the conductive plate, thereby achieving grounding. This prevents the static electricity released instantaneously when a person touches the computer keyboard from affecting the electronic components inside the keyboard, thus causing the keys to malfunction.

[0008] The surface of the grounding silver point is covered with conductive adhesive. When the flexible circuit board is assembled with the key device, the conductive adhesive comes into contact with the conductive plate inside the key device, so that static electricity is conducted away by the conductive plate, thereby achieving grounding. This prevents the static electricity released instantaneously when a person touches the computer keyboard from affecting the electronic components inside the keyboard, which could cause the keys to malfunction.

[0009] Through the above technical solution, this utility model has the following beneficial effects: By printing a ground wire and at least one ground wire silver point, the ground wire silver point is made to directly or indirectly contact the conductive plate to achieve grounding, without the need for an external ground wire. This prevents the static electricity released instantaneously when a person touches the computer keyboard from affecting the electronic components inside the keyboard and causing the keys to malfunction. Attached Figure Description

[0010] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly described below.

[0011] Figure 1 This is an exploded view of the flexible circuit board disclosed in this utility model. Figure 2 This is a partial structural diagram of the upper PET layer with printed ground lines and silver dots as disclosed in Example 1. Figure 3 for Figure 2 Enlarged structural diagram of section A in the middle; Figure 4 This is a partial cross-sectional view of the flexible circuit board in Example 1, where the ground silver point is in contact with the conductive plate. Figure 5 This is a partial structural diagram of the upper PET layer with carbon ink printed on the surface of the ground silver dots as disclosed in Example 2. Figure 6 for Figure 5Enlarged structural diagram of section B in the middle; Figure 7 This is a partial cross-sectional view of the flexible circuit board in which carbon ink contacts a conductive plate, as disclosed in Example 2. Figure 8 This is a partial structural diagram of the upper PET layer with conductive adhesive attached to the carbon ink surface disclosed in Example 3. Figure 9 for Figure 8 Enlarged structural diagram of section C; Figure 10 This is a partial cross-sectional view of the flexible circuit board in which the conductive adhesive contacts the conductive plate, as disclosed in Example 3. Figure 11 This is a partial structural diagram of the upper PET layer with conductive adhesive attached to the surface of the ground wire silver point disclosed in Example 4. Figure 12 for Figure 11 Enlarged structural diagram of section D in the middle; Figure 13 This is a partial cross-sectional view of the flexible circuit board in Example 4, where the conductive adhesive is in contact with the conductive plate.

[0012] The numbers in the diagram represent: 1. Upper PET layer; 2. Upper circuit layer; 3. Upper UV insulation layer; 4. Upper silver jumper layer; 5. Upper waterproof adhesive layer; 6. Middle PET layer; 7. Lower waterproof adhesive layer; 8. Lower silver jumper layer; 9. Lower UV insulation layer; 10. Lower circuit layer; 11. Lower PET layer; 12. Ground wire; 121. Ground wire silver dot; 13. Carbon ink layer; 14. Conductive adhesive; 20. Conductive plate. Detailed Implementation

[0013] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0014] Example 1: refer to Figure 1-4 This embodiment 1 provides a grounded flexible circuit board, which includes, from top to bottom, an upper PET1, an upper circuit 2, an upper insulating UV3, an upper jumper silver 4, an upper waterproof adhesive 5, a middle PET6, a lower waterproof adhesive 7, a lower jumper silver 8, a lower insulating UV9, a lower circuit 10, and a lower PET11.

[0015] Among them, the upper layer circuit 2, the upper layer insulation UV 3, the upper layer silver jumper 4 and the upper layer waterproof adhesive 5 are printed on the upper layer PET1 in sequence; the lower layer circuit 10, the lower layer insulation UV 9, the lower layer silver jumper 8 and the lower layer waterproof adhesive 7 are printed on the lower layer PET11 in sequence. The upper PET1 layer is also printed with a ground wire 12 and at least one ground wire silver point 121 connected to the ground wire 12. When the flexible circuit board is assembled with the key device, the ground wire silver point 121 contacts the conductive plate 20 inside the key device, so that the static electricity is conducted away by the conductive plate 20, thereby achieving grounding and preventing the static electricity released instantaneously when the human body touches the computer keyboard from affecting the electronic components inside the keyboard, thus causing the keys to malfunction.

[0016] Example 2: Based on Example 1 and referring to Figure 5-7 The surface of the grounding silver point 121 is printed with a layer of carbon ink 13, which can protect the grounding silver point 121 and improve the oxidation resistance of the grounding wire 12. When the flexible circuit board is assembled with the key device, the carbon ink 13 comes into contact with the conductive plate 20 inside the key device, so that the static electricity is conducted away by the conductive plate 20, thereby achieving grounding and preventing the static electricity released instantaneously when the human body touches the computer keyboard from affecting the electronic components inside the keyboard, thus causing the keys to malfunction.

[0017] Example 3: Based on Example 2 and referring to Figure 8-10 The surface of the carbon ink 13 is covered with conductive adhesive 14. When the flexible circuit board is assembled with the key device, the conductive adhesive 14 comes into contact with the conductive plate 20 inside the key device, so that the static electricity is conducted away by the conductive plate 20, thereby achieving grounding and preventing the static electricity released instantaneously when the human body touches the computer keyboard from affecting the electronic components inside the keyboard, thus causing the keys to malfunction.

[0018] Example 4: Based on Example 1 and referring to Figure 11-13 The surface of the grounding silver point 121 is covered with conductive adhesive 14. When the flexible circuit board is assembled with the key device, the conductive adhesive 14 comes into contact with the conductive plate 20 inside the key device, so that the static electricity is conducted away by the conductive plate 20, thereby achieving grounding and preventing the static electricity released instantaneously when the human body touches the computer keyboard from affecting the electronic components inside the keyboard, thus causing the keys to malfunction.

[0019] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to the above embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A grounded flexible circuit board, comprising, from top to bottom, an upper PET (1), an upper circuit (2), an upper insulating UV (3), an upper jumper silver (4), an upper waterproof adhesive (5), a middle PET (6), a lower waterproof adhesive (7), a lower jumper silver (8), a lower insulating UV (9), a lower circuit (10), and a lower PET (11). in, The upper layer circuit (2), upper layer insulation UV (3), upper layer silver jumper (4) and upper layer waterproof adhesive (5) are sequentially printed on the upper layer PET (1); The lower layer circuit (10), the lower layer insulation UV (9), the lower layer silver jumper (8) and the lower layer waterproof adhesive (7) are sequentially printed on the lower layer PET (11); Its features are: The upper PET (1) is also printed with a ground wire (12) and at least one ground wire silver point (121) connected to the ground wire (12). When the flexible circuit board is assembled with the button device, the ground wire silver point (121) contacts the conductive plate (20) inside the button device.

2. The grounded flexible circuit board according to claim 1, characterized in that, The surface of the ground silver point (121) is printed with a layer of carbon ink (13), which can protect the ground silver point (121) and improve the oxidation resistance of the ground (12). When the flexible circuit board is assembled with the button device, the carbon ink (13) comes into contact with the conductive plate (20) inside the button device.

3. The grounded flexible circuit board according to claim 2, characterized in that, The surface of the carbon ink (13) is covered with conductive adhesive (14). When the flexible circuit board is assembled with the button device, the conductive adhesive (14) comes into contact with the conductive plate (20) inside the button device.

4. The grounded flexible circuit board according to claim 1, characterized in that, The surface of the grounding silver point (121) is covered with conductive adhesive (14). When the flexible circuit board is assembled with the button device, the conductive adhesive (14) comes into contact with the conductive plate (20) inside the button device.

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