TWI611445B - Graphene applied to the contact surface of keyboard keys and its structure - Google Patents

Description

Graphene applied to the contact surface of keyboard keys and its structure

The invention is applied to the technical field of circuits, in particular to the contact surface and structure of graphene applied to keyboard keys, and has the effects of waterproofing and anti-oxidation, so that the problem of oxidation of the silver paste layer is effectively solved after stacking.

Press, the circuit and the switch have an important position in daily life articles, wherein the general keyboard system comprises a plurality of buttons, each of which comprises: a substrate, a membrane switch, a keycap, a supporting device and an elastic conductor. The supporting device is mounted on the substrate, and the substrate is formed with a structure for assisting the fixing of the supporting device. The keycap is mounted on the support device. The support device limits vertical movement of the keycap relative to the membrane switch and moves between an unpressed position and a depressed position.

For example, as described below, a conventional switch structure includes a substrate, a membrane switch, and an elastic conductor. The elastic conductor includes an elastic dome and an actuating column, and the elastic conductive system is disposed on the film. a switch, wherein the membrane switch is a switch using a silver paste laying circuit; wherein the elastic dome body is provided with an open end and a plurality of vent holes are arranged around the open end; and the actuating column is formed in the elastic dome body, And protruding toward the open end; an external force is applied to the top end of the elastic conductor to deform the elastic dome body, and the internal gas can be discharged from each of the exhaust holes, so that a free end of the actuating column contacts the membrane switch to form a conduction. When the deformed elastic conductor recovers, gas is drawn from each of the vent holes, and the actuating column is separated from the membrane switch.

However, the free end surface of the actuating column is fixed with a carbon layer, but the carbon layer is abraded when the number of times of use increases, resulting in an increase in impedance value or poor contact, and the silver paste circuit layer is also susceptible to oxidation due to contact with air.

In order to solve the foregoing situation, another embodiment is characterized in that a silver paste layer is fixed on the bottom surface of the actuating column to avoid the problem of wear during use; however, there is still room for improvement in the use of the silver paste layer. When the layer is exposed to moisture, the surface will oxidize rapidly, which may lead to poor contact, etc., so that when the military is operating in the sea, the keyboard must be completely covered to protect the switch structure, and then operate to avoid the switch structure quickly after soaking. Oxidation, but the switch structure after covering the keyboard is bulky and inconvenient to carry, so the structure of the above two conventional applications is limited to the use occasion, which has long plagued the relevant personnel.

In view of this, the inventor has been engaged in the manufacturing development and design experience of related products for many years. After detailed design and careful evaluation, the inventor has finally obtained the practical invention.

I used a layer of silver paste to contact the surface of the water. Rapid oxidation, which leads to problems such as poor contact, so that when the military used to operate in the sea, it must be completely covered to protect the switch structure, and then operate to avoid rapid oxidation after the switch structure is soaked, but the switch is covered after the keyboard is covered. The bulk of the structure is such that it is inconvenient to carry.

In view of the above problems, the present invention provides a use of graphene, which forms a gelatinous mixture of the graphene mixed fixing agent, and is applied to a contact surface of a keyboard button to make an electrode structure and a switch. The surface of the contact does not oxidize, causing an increase in resistance value and poor contact.

Among them, graphene must be ground to a nano-sized powder.

Wherein, the non-metal polymer conductive material in the gel mixture accounts for 1% to 50% by weight of the total weight.

Wherein the fixing agent in the gelled mixture accounts for 50% to 99% by weight of the total weight.

Among them, the fixing agent in the gel mixture is glue and resin.

The structure of the graphene applied to the contact surface of the keyboard button comprises: a substrate, the inside of the substrate is a circuit and the surface of the substrate is fixed with a plurality of electrode structures; and an elastic structure, the elastic structure is provided with an opening downward a switch structure is fixed on the top surface of the opening, the switch structure is columnar and protrudes toward the opening; and the elastic structure is disposed on the surface of the substrate such that the free ends of the switch structure in the opening correspond to the pair Above the electrode structure, the main feature is that: the switch structure is fixed with a first graphene conductor layer on the free end surface; and each of the electrode structure surfaces is respectively fixed with a second graphene conductor layer; When the elastic structure is pressed downward, the first graphene conductor layer at the free end of the switch structure contacts each of the second graphene conductor layers on the top of each of the electrode structures to complete conduction of the circuit.

Wherein, the first graphene conductor layer is fixed after the free end surface of each of the switch structures is fixed with a silver paste layer.

Wherein, a silver paste circuit layer is fixed on the top surface of each of the electrode structures, and then each of the second graphene conductor layers is fixed.

Each of the electrode structures is fixed in pairs on a top surface of the substrate.

Wherein, the elastic structure is provided with a plurality of perforations corresponding to the end faces of the substrate.

The invention uses a graphene conductive material as a circuit and opens For the purpose of use, the graphene conductive material is mixed with the fixing agent to form a gel mixture, and the gel mixture is applied to the electrode structure and the surface of the switch contact. Since the graphene conductive material has the characteristics of hydrophobicity, oleophobicity and low impedance, Therefore, the anti-oxidation effect is obtained; after the above steps are performed, the electrode structure and the surface of the switch contact have the respective graphene conductor layers, which can effectively solve the problem of oxidation of the silver paste layer after being applied to the stack of the present invention, and Abraded carbon layers cause problems such as increased impedance or poor contact.

The techniques, means and functions of the present invention will be described in detail with reference to the drawings and drawings, and will enable the reviewing committee to have a more detailed understanding of the present invention and to familiarize themselves with the The present invention can be implemented by the following, and the following is merely to explain the preferred embodiment and not to limit the scope of the present invention, and thus any form of alteration of the creation of the present invention based on the inventive spirit of the present invention. Or modifications are intended to be within the scope of the invention.

(A)‧‧‧Step 1

(B) ‧‧‧Step 2

(C) ‧‧‧Step 3

10‧‧‧Substrate

11‧‧‧Electrode structure

20‧‧‧Flexible structure

21‧‧‧ openings

22‧‧‧Switch structure

23‧‧‧Perforation

30‧‧‧First graphene conductor layer

31‧‧‧Second graphene conductor layer

50‧‧‧ Silver paste circuit layer

60‧‧‧ Silver paste layer

Figure 1 is a schematic diagram showing the steps of the application of the present invention.

Fig. 2 is a perspective view showing the appearance of the elastic structure of the present invention.

Fig. 3A is a side sectional view showing the first embodiment of the present invention.

Fig. 3B is a side cross-sectional view showing the press deformation of the first embodiment of the present invention.

Figure 4A is a side cross-sectional view showing a second embodiment of the present invention.

Fig. 4B is a side cross-sectional view showing the press deformation of the second embodiment of the present invention.

Fig. 5A is a side sectional view showing a third embodiment of the present invention.

Fig. 5B is a side cross-sectional view showing the press deformation of the third embodiment of the present invention.

Figure 6 is a side cross-sectional view showing the number of switch structures of the present invention.

Annex I: The test of the graphene of the present invention applied to a circuit.

The use of graphene, the graphene mixed fixing agent is formed into a gel mixture, and is applied to the contact surface of the keyboard button, so that the electrode structure and the surface of the switch contact are not oxidized, resulting in an increase in resistance value and poor contact. problem.

Among them, graphene must be ground to a nano-sized powder.

Wherein, the graphene conductive material in the gelled mixture accounts for 1% to 50% by weight of the total weight.

Wherein the fixing agent in the gelled mixture accounts for 50% to 99% by weight of the total weight.

Among them, the fixing agent in the gel mixture is glue and resin.

Please refer to FIG. 1 as follows. The implementation steps of the application of the present invention are as follows:

Step 1 (A): Graphene is first ground to a nano-sized powder.

Step 2 (B): mixing the fixing agent with one or any combination of liquid ethylene dioxythiophene, graphene nano powder, and polyaniline nano powder to form a gel mixture.

Step 3 (C): Apply the gelatinous mixture to the electrode structure and the surface of the switch contact.

Please refer to FIG. 2 to FIG. 6 as follows. A structure in which graphene is applied to the contact surface of a keyboard button includes: a substrate 10 having an internal circuit and the surface of the substrate 10 being fixed in pairs. Number electrode structure 11; An elastic structure 20 is disposed with an opening 21 facing downwardly, and a top surface of the opening 21 is fixed with a switch structure 22, the switch structure 22 is columnar and protrudes toward the opening 21; The surface of the substrate 10 is such that the free end of the switch structure 22 in the opening 21 corresponds to the pair of the electrode structures 11. The main feature of the switch structure 22 is that a first graphite is fixed on the free end surface. And a second graphene conductor layer 31 is respectively fixed on the surface of each of the electrode structures 11; by the above configuration, when the elastic structure 20 is pressed downward, the first end of the free end of the switch structure 22 The graphene conductor layer 30 contacts each of the second graphene conductor layers 31 on the top of each of the electrode structures 11 to complete the conduction of the circuit.

After the silver alloy layer 60 is fixed on the free end surface of each of the switch structures 22, the first graphene conductor layer 30 is covered, and the free end surface periphery of the switch structure 22 and the first graphene conductor layer 30 are contact.

After the silver electrode circuit layer 50 is fixed on the top surface of each of the electrode structures 11, the second graphene conductor layer 31 is covered, and the peripheral edge of the top surface of the electrode structure 11 is in contact with the second graphene conductor layer 31.

Each of the electrode structures 11 is fixed to the top surface of the substrate 10 in pairs.

The elastic structure 20 is provided with a plurality of through holes 23 corresponding to the end faces of the substrate 10.

Referring to FIGS. 3A to 3B and FIG. 6 , when the structure of the first embodiment of the present invention is actuated, the elastic structure 20 is pressed against the substrate 10 to a distortion, so that the switch protrudes from the inside of the opening 21 . The first graphene conductor layer 30 at the free end of the structure 22 touches each of the second graphene conductor layers 31 on the top of each of the electrode structures 11 in the substrate 10, thereby achieving the purpose of conduction, and Applying a plurality of elastic structures 20 and a plurality of pairs of the electrode structures 11 on the same substrate 10; a particularly noteworthy structural combination is that the switch structure 22 directly fixes the first graphene conductor layer 30 at the free end, and each After the silver paste circuit layer 50 is fixed on the surface of the electrode structure 11, the second graphene conductor layer 31 is fixed.

And referring to FIGS. 4A to 4B as follows, the second embodiment of the present invention is operated in the same manner as the first embodiment; but a particularly noteworthy structural combination is that the surface of the free end of the switch structure 22 is fixed. After the silver paste layer 60, the first graphene conductor layer 30 is further fixed; and the silver paste circuit layer 50 is fixed on the surface of each of the electrode structures 11, and then the second graphene conductor layer 31 is fixed.

Referring finally to Figures 5A to 5B, the third embodiment of the present invention is operated in the same manner as the first embodiment; however, it is particularly noteworthy that the first structure of the switch structure 22 is directly fixed to the first graphene. Each of the second graphene conductor layers 31 is directly fixed to the conductor layer 30 and each of the electrode structures 11.

With the above structure, each of the first graphene conductor layer 30 and each of the second graphene conductor layers 31 can effectively avoid the wear of the carbon layer when the number of times of use increases, resulting in an increase in the impedance value and poor contact, and simultaneously solving the silver. The slurry circuit layer 50 and the silver paste layer 60 are rapidly oxidized after contact with moisture, resulting in problems such as poor contact, thereby improving the overall durability, and at the same time achieving the purpose of operation in various underwater instruments or humid spaces.

Continued, please refer to Annex 1 for the resistance value test after the oxidation of the general silver line and the silver wire with graphene on the surface; first take a silver line and measure the impedance value of the silver line, and put the silver line into the water to make silver The line is oxidized. After standing for 10 days, the silver line is taken out and dried, and the impedance of the silver line after oxidation is measured again, and the impedance value thereof has been significantly increased; In addition, another silver wire of the same length is taken, the surface is coated with graphene and placed in the bakelite jig, and the jig and the silver wire coated with graphene are placed in the oven, and the baking condition is 130 degrees/ After 30 minutes, after taking out, take out the resistance value of the graphene line first, and then put it in water for 10 days for oxidation, then take it out and dry, observe that the surface of the graphene line is not oxidized and measure the impedance of the graphene line. Not significantly elevated.

By the above test, it can be known that after the oxidation, the difference between the resistance values of the general silver line and the graphene surface before and after oxidation is measured; the surface is effectively solved by the graphene stacking, and the graphene is effectively oxidized. There is no significant increase in surface resistance and poor contact.

While the present invention has been disclosed in its preferred embodiments as described above, it is not intended to limit the invention, and the invention may be modified and modified without departing from the spirit and scope of the invention. The scope is subject to the definition of the scope of the patent application attached.

(A)‧‧‧Step 1

(B) ‧‧‧Step 2

(C) ‧‧‧Step 3

Claims (4)

A structure for applying a graphene to a contact surface of a keyboard button comprises: a substrate having an internal circuit and a plurality of electrode structures fixed on the surface of the substrate; and an elastic structure, the elastic structure is provided with an opening downward a switch structure is fixed on the top surface of the opening, the switch structure is columnar and protrudes toward the opening; and the elastic structure is disposed on the surface of the substrate such that the free ends of the switch structure in the opening correspond to the pair Above the electrode structure, the main feature is that the switch structure is fixed with a first graphene conductor layer on the free end surface; and at least one silver paste circuit layer is respectively fixed on the top surface of each electrode structure, and then overlaid Corresponding to one of the second graphene conductor layers; by the above configuration, when the elastic structure is pressed downward, the first graphene conductor layer at the free end of the switch structure contacts the second graphite at the top of each of the electrode structures The olefin conductor layer is used to complete the conduction of the circuit. The structure of applying the graphene to the contact surface of the keyboard button according to claim 1, wherein the first end of the switch structure is fixed with a silver paste layer, and then the first graphene conductor layer is overlaid. A peripheral edge of the free end surface of the switch structure is in contact with the first stone ground conductor layer. The structure of applying the graphene to the contact surface of the keyboard button according to claim 1, wherein each of the electrode structures is fixed in pairs on the top surface of the substrate. The structure of applying the graphene to the contact surface of the keyboard button according to claim 1, wherein the elastic structure is provided with a plurality of perforations corresponding to the end surface of the substrate.