Composite device for keyboard contacts

Abstract

The utility model relates to the technical field of keyboards, in particular to a composite device for keyboard contacts, which comprises a contact base body and a keyboard, alloy materials are inlaid on a contact working face at the top of the contact base body and are copper-based alloy, an installation groove is arranged on the upper surface of the keyboard, and the installation groove is provided with a through hole. Clamping grooves are formed in the front and rear groove walls of the mounting groove; an integrally-formed contact surface layer is arranged on the alloy material, the contact surface layer is conical, the longitudinal section of the contact surface layer is in an isosceles trapezoid shape, the contact surface layer and the alloy material are integrally formed, and arc-shaped elastic pieces used for being clamped into the clamping grooves are arranged on the front surface and the rear surface of the contact base body. The side wall of the contact base body is provided with an integrally formed positioning mark. According to the keyboard contact compounding device, high-conductivity materials are inlaid in the working face, resistance loss is reduced, sensitivity is improved, a wear-resistant process is adopted, the service cycle is prolonged, materials are inlaid in the key face, the using amount of precious metal is reduced, and cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of keyboard technology, and in particular to a composite device for keyboard contacts. Background Technology

[0002] In the current keyboard manufacturing industry, keyboard contacts are the key components for transmitting key signals. Traditional keyboard contacts are manufactured using various processes, among which a common one is full-surface gold plating. This process involves uniformly covering the entire outer surface of the contact with a gold film. Gold has excellent conductivity and oxidation resistance, which, to a certain extent, ensures stable conductivity of the contacts during use and reduces contact problems caused by oxidation and other factors.

[0003] The traditional method of plating the entire surface of keyboard contacts with gold has high costs, and the gold-plated parts of the non-contact working surfaces are prone to wear and tear and waste resources during long-term use. With the diversification and high frequency of keyboard use, higher requirements are placed on the sensitivity and service life of keyboard contacts, and a new keyboard contact composite device is urgently needed to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to address the following shortcomings in the existing technology: the traditional method of plating the entire surface of keyboard contacts with gold is costly, and the gold-plated parts of the non-contact working surfaces are prone to wear and tear and waste resources during long-term use. Therefore, a composite device for keyboard contacts is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A composite device for keyboard contacts includes a contact base and a keyboard. The top contact working surface of the contact base is inlaid with an alloy material, which is a copper-based alloy. The alloy material undergoes a heat treatment process and is firmly bonded to the contact base through a high-temperature sintering process. The upper surface of the keyboard has an installation groove for the contact base to enter, and the front and rear walls of the installation groove have slots.

[0007] The alloy material has an integrally formed contact surface layer, which is conical and has an isosceles trapezoidal longitudinal section. The contact surface layer is integrally formed with the alloy material. The front and rear surfaces of the contact base are provided with arc-shaped spring pieces for engaging in slots. The sidewall of the contact base is provided with an integrally formed positioning mark, which is used to ensure that the contact base is quickly and accurately installed into the mounting slot.

[0008] Preferably, a buffer layer is provided at the bottom of the contact substrate. The buffer layer is made of silicone material, and an adhesive patch is provided at the bottom of the buffer layer. The adhesive patch is made of double-sided adhesive material.

[0009] Preferably, the surface of the contact layer is coated with a nano-silver coating, the thickness of which is 0.15 mm.

[0010] Preferably, multiple hemispherical protrusions are fixedly installed on all four sides of the contact surface layer, and the diameter of the hemispherical protrusions is 0.5 mm.

[0011] Preferably, the positioning mark includes two cylinders, a mounting plate is fixedly installed on one side of the contact base, the two cylinders are vertically fixedly installed on the lower surface of the mounting plate, a groove with an equilateral triangle cross-section is opened on the side of the contact base away from the cylinders, a triangular block for inserting into the groove is fixedly installed on the groove wall, the thickness of the groove is greater than the thickness of the triangular block, and two circular slots are opened on the upper surface of the keyboard for the bottom ends of the two cylinders to be inserted.

[0012] Preferably, the surface of the cylinder, the groove wall, the surface of the triangular block, and the groove wall are all coated with a fluorescent coating.

[0013] The beneficial effects of this utility model are as follows:

[0014] By embedding highly conductive materials into the contact working surfaces, resistance loss during signal transmission is reduced, enabling key trigger signals to be transmitted to the keyboard circuit more quickly and accurately. This significantly improves the sensitivity of the keyboard contacts. Both the embedded components of the contact working surfaces and the pressed contact surface components are made of wear-resistant materials and processes, effectively reducing problems such as poor contact caused by wear during long-term use and greatly extending the service life of the keyboard. Compared to the traditional method of plating the entire surface with gold, this composite device only embeds specific materials into the critical contact working surfaces, reducing the amount of precious metals and other materials used and effectively reducing production costs. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of a composite device for keyboard contacts proposed in this utility model.

[0016] Figure 2 This is a top-view perspective view of the keyboard area in a composite device for keyboard contacts proposed in this utility model;

[0017] Figure 3 This is a three-dimensional schematic diagram of the left side of the contact base in a composite device for keyboard contacts proposed in this utility model;

[0018] Figure 4This is a three-dimensional schematic diagram of the right side of the contact base in a composite device for keyboard contacts proposed in this utility model;

[0019] Figure 5 This is a schematic diagram of a composite device for keyboard contacts proposed in this utility model and a partial cross-sectional structure during keyboard installation.

[0020] In the diagram: 1. Contact base, 2. Alloy material, 3. Contact surface layer, 4. Positioning mark, 5. Keyboard, 6. Mounting slot, 7. Buffer layer, 8. Adhesive patch, 9. Hemispherical protrusion, 10. Cylinder, 11. Slot, 12. Arc-shaped spring, 13. Groove, 14. Triangular block, 15. Circular groove. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Reference Figures 1-5 A composite device for keyboard contacts includes a contact substrate 1 and a keyboard 5. The top contact working surface of the contact substrate 1 is inlaid with an alloy material 2, which is a copper-based alloy, wherein the mass ratio of copper is 70%-80%, and the remainder is tin, zinc and other metal elements. The alloy material 2 undergoes a heat treatment process, which gives it high hardness and good conductivity, effectively improving the wear resistance and conductivity stability of the contacts. The alloy material 2 and the contact substrate 1 are firmly bonded together by a high-temperature sintering process. During the sintering process, the contact substrate 1 and the alloy material 2 are placed in a specific mold and kept at a high temperature of 800-1000℃ for 1-2 hours to form a metallurgical bond between them. The upper surface of the keyboard 5 is provided with an installation groove 6 for the contact substrate 1 to enter. The front and rear walls of the installation groove 6 are provided with slots 11.

[0023] The alloy material 2 has an integrally formed contact surface layer 3, which is pressed into a cone shape and has an isosceles trapezoidal cross section. This shape design can increase the contact area between the contact and the button, improve the conductivity, and better disperse stress when subjected to button pressure, thus reducing contact wear. The contact surface layer 3 is integrally formed with the alloy material 2. The front and rear surfaces of the contact base 1 are provided with arc-shaped spring pieces 12 for locking into the slot 11. The side wall of the contact base 1 is provided with an integrally formed positioning mark 4, which is used to ensure that the contact base 1 is quickly and accurately installed into the mounting slot 6.

[0024] A buffer layer 7 is provided at the bottom of the contact base 1. The buffer layer 7 is made of silicone material, which can cushion the key when it is pressed, reduce the impact on the circuit board of the keyboard 5, and reduce the noise generated during key operation. An adhesive patch 8 is provided at the bottom of the buffer layer 7. The adhesive patch 8 is made of double-sided adhesive material. When the composite device is installed in the mounting slot 6, the adhesive patch 8 can further enhance the connection stability between the composite device and the keyboard 5, and facilitate disassembly and replacement when needed.

[0025] The surface of the contact layer 3 is coated with a layer of nano-silver coating with a thickness of 0.15 mm. The nano-silver coating has good conductivity and antibacterial properties, which can further improve the conductivity of the contact and inhibit bacterial growth, keeping the keyboard 5 hygienic.

[0026] Multiple hemispherical protrusions 9 are fixedly installed on all four sides of the contact surface layer 3. The diameter of the hemispherical protrusions 9 is 0.5 mm. These hemispherical protrusions 9 can increase the friction when the contact point contacts the button, thereby further improving the stability of the button operation.

[0027] The positioning mark 4 includes two cylinders 10. A mounting plate is fixedly installed on one side of the contact base 1. The two cylinders 10 are vertically fixedly installed on the lower surface of the mounting plate. A groove 13 with an equilateral triangle cross-section is opened on the side of the contact base 1 away from the cylinders 10. A triangular block 14 for inserting into the groove 13 is fixedly installed on the groove wall of the slot 11. The thickness of the groove 13 is greater than the thickness of the triangular block 14. Two circular slots 15 are opened on the upper surface of the keyboard 5 for inserting the bottom ends of the two cylinders 10 respectively.

[0028] When installing the contact base 1 into the mounting groove 6, first align the two cylinders 10 and the groove 13 with the two circular grooves 15 and the triangular block 14 respectively. Then, tilt the contact base 1 so that the end of the contact base 1 with the groove 13 enters the mounting groove 6 first, and insert the end of the triangular block 14 into the groove 13. Then, gradually rotate the contact base 1 to a horizontal position. At this time, the bottom ends of the two cylinders 10 will correspond to the positions of the two circular grooves 15 respectively. Then, control the contact base 1 to move downward. During this transition, the two arc-shaped spring pieces 12 move away from each other. One side will slide in contact with the groove wall of the mounting groove 6. Under the action of pressure, the arc-shaped spring piece 12 will be completely deformed until the contact base 1 moves down to the bottom of the two cylinders 10 and is inserted into the two circular grooves 15 respectively, and can no longer move down. At this time, the two arc-shaped spring pieces 12 will enter the two slots 11 respectively. The pressure force of the groove wall of the mounting groove 6 on the arc-shaped spring piece 12 disappears, and the arc-shaped spring piece 12 will quickly rebound under its own elastic potential energy, thus forming a snap with the slot 11. At the same time, the upper surface of the triangular block 14 will also abut against the top wall of the groove 13.

[0029] The positions and dimensions of the cylinder 10 and the groove 13 are precisely matched with the circular groove 15 and the triangular block 14 to ensure that the contact base 1 can be accurately installed in the corresponding position of the keyboard 5 when the composite device is installed. This ensures that the alloy material 2 and the contact surface layer 3 can function normally and realize the conductive function of the contact. The arc-shaped spring piece 12 cooperates with the slot 11. When the composite device is installed in place, the arc-shaped spring piece 12 is inserted into the slot 11 to further fix the composite device and prevent it from loosening during use.

[0030] The advantage of cylinder 10 lies in its isotropic nature. When it is inserted into the circular groove 15 on keyboard 5, it can achieve good fit no matter which angle it is inserted from, reducing the difficulty of installation and improving the efficiency of installation. The cross-section of groove 13 is an equilateral triangle. Since the equilateral triangle has unique symmetry and stability, when it is inserted into the triangular block 14 on keyboard 5, it can provide positioning constraints in three directions, further improving the accuracy of positioning.

[0031] The surface of cylinder 10, the groove wall of groove 13, the surface of triangular block 14, and the groove wall of circular groove 15 are all coated with a fluorescent coating. The fluorescent coating can emit a faint light in the dark environment, which facilitates the installation and maintenance of the contact composite device in the case of insufficient light.

[0032] In this invention, by embedding highly conductive material in the working surface of the contact points, the resistance loss during signal transmission is reduced, enabling the key trigger signal to be transmitted to the keyboard 5 circuit more quickly and accurately, thereby significantly improving the sensitivity of the contact points. Both the embedded component of the working surface of the contact points and the pressed contact surface layer 3 component are made of wear-resistant materials and processes, effectively reducing problems such as poor contact caused by wear of the contact points during long-term use, and greatly extending the service life of the keyboard 5. Compared with the traditional method of gold plating the entire surface, this composite device only embeds specific materials in the key working surface of the contact points, reducing the amount of precious metals and other materials used, and effectively reducing production costs.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A composite device for keyboard contacts, comprising a contact substrate (1) and a keyboard (5), characterized in that, The top contact working surface of the contact base (1) is inlaid with an alloy material (2), which is a copper-based alloy. The alloy material (2) has undergone heat treatment and is firmly bonded to the contact base (1) through a high-temperature sintering process. The upper surface of the keyboard (5) is provided with an installation groove (6) for the contact base (1) to enter. The front and rear walls of the installation groove (6) are provided with slots (11). The alloy material (2) is provided with an integrally formed contact surface layer (3). The contact surface layer (3) is conical and the longitudinal section of the contact surface layer (3) is an isosceles trapezoid. The contact surface layer (3) is integrally formed with the alloy material (2). The front and rear surfaces of the contact base (1) are provided with arc-shaped spring pieces (12) for being inserted into the slot (11). The side wall of the contact base (1) is provided with an integrally formed positioning mark (4). The positioning mark (4) is used to ensure that the contact base (1) is quickly and accurately installed into the mounting slot (6).

2. The composite device for keyboard contacts according to claim 1, characterized in that, The bottom of the contact substrate (1) is provided with a buffer layer (7), which is made of silicone material. The bottom of the buffer layer (7) is provided with an adhesive patch (8), which is made of double-sided adhesive material.

3. The composite device for keyboard contacts according to claim 1, characterized in that, The surface of the contact layer (3) is coated with a layer of nano-silver coating, the thickness of which is 0.15 mm.

4. A composite device for keyboard contacts according to claim 1, characterized in that, Multiple hemispherical protrusions (9) are fixedly installed on all four sides of the contact surface layer (3), and the diameter of the hemispherical protrusions (9) is 0.5 mm.

5. A composite device for keyboard contacts according to claim 1, characterized in that, The positioning mark (4) includes two cylinders (10). A mounting plate is fixedly installed on one side of the contact base (1). The two cylinders (10) are vertically fixedly installed on the lower surface of the mounting plate. A groove (13) with an equilateral triangle cross-section is opened on the side of the contact base (1) away from the cylinders (10). A triangular block (14) for inserting into the groove (13) is fixedly installed on the groove wall of the slot (11). The thickness of the groove (13) is greater than the thickness of the triangular block (14). Two circular slots (15) are opened on the upper surface of the keyboard (5) for inserting the bottom ends of the two cylinders (10).

6. A composite device for keyboard contacts according to claim 5, characterized in that, The surface of the cylinder (10), the groove wall of the groove (13), the surface of the triangular block (14), and the groove wall of the circular groove (15) are all coated with a fluorescent coating.

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