Manufacturing process of key touch switch adopting stainless steel base material

Abstract

The invention discloses a process for manufacturing a key touch switch by adopting a stainless steel base material, which comprises the following steps of: processing the base material, carrying out primary inspection on the stainless steel base material, carrying out punch forming, keeping the thickness of the stainless steel base material between 0.01 mm and 0.07 mm, carrying out sampling inspection on the sheet-shaped base material, and cutting off the base material to form a single switch main body; a cleaning process: cleaning each molded switch main body, and then carrying out temperature control at 30-60 DEG C; a performance detection procedure: after the plating is finished, performing a performance test, performing a pressing test by adopting an aluminum round head with the diameter of 2.0 mm, and keeping the pressing force degree to be twice of the pressing force range of one stroke and the number of times to be five; a service life testing process: vertically aligning an aluminum flat head with a diameter of 1.0 mm to the center of the switch main body to strike at a speed of 120 times / min; sampling inspection and discharging; and discharging and packaging after final sampling inspection. The problems that a key trigger switch in the prior art is low in quietness, not high in stroke consistency after being used for a long time and large in thickness are solved.

Description

Technical Field

[0001] The invention relates to the field of electronic keys, and in particular to a manufacturing process of a key-actuated switch using a stainless steel substrate. Background Art

[0002] In the prior art, keys, as the main input tool for electronic devices, have been widely used. For example, common electronic devices such as mobile phones and computers. In a computer, the key structure is generally composed of a keycap and an internal trigger switch, a PCB, etc., and the trigger switch is mainly connected and disconnected with the PCB by a conductive adhesive. The conductive adhesive is made of silicone and has the advantages of low cost and easy production. At the same time, this type of trigger switch made of silicone also has the following defects: 1. It is easy to age. After a long period of use, the silicone structure will age and deform, resulting in changes in the feel of the keys, yellowing and damage; 2. The thickness is relatively thick, and the conductivity is easily affected; 3. It is noisy and lacks quietness.

[0003] In view of this, the technical solution proposes a manufacturing process of a push-button touch switch using a stainless steel substrate, which uses stainless steel (301) as the substrate and also has a metal coating. It has excellent conductivity and a long service life (5 million times of high consistency stroke). Due to the stainless steel substrate coating structure, it is thinner and highly quiet. In addition, the manufacturing process is simple and easy to assemble and use. Summary of the invention

[0004] The technical solution of the present invention aims to solve at least one of the technical problems in the related art to a certain extent. To this end, the main purpose of the present invention is to provide a manufacturing process for a key-touch switch using a stainless steel substrate, aiming to solve the problems of low quietness, low travel consistency after long-term use, and thick thickness of the key-touch switch in the prior art.

[0005] To achieve the above object, the present invention provides a manufacturing process for a key-touch switch using a stainless steel substrate, including the following processing method: Substrate processing, After the stainless steel substrate is initially inspected, it is stamped and formed, and its thickness is kept between 0.01mm-0.07mm. After the sheet substrate is sampled, the substrate is cut to form a single switch body; Cleaning process, After cleaning the molded switch bodies, the temperature is kept at 30-60°C; Performance testing process, After the coating is completed, the performance test is carried out, and a 2.0mm diameter aluminum round head is used for the downward pressure test, and the downward pressure is maintained at twice the pressure range of one stroke, and the number of times is 5; Service life test process, Use an aluminum flat head with a diameter of 1.0 mm to vertically aim at the center of the switch body and strike at a speed of 120 times / min; Sampling out the material; After the final random inspection, the materials are unloaded and packaged.

[0006] As a further solution of the present invention, the key-touch switch structure includes a circular switch body and a fixed foot arranged on the outer edge of the switch body, and the fixed foot is arranged with four end points extending from two perpendicular diameter lines of the switch body, and the junction between the switch body and the fixed foot is a bent portion bent in the pressing direction, the surface of the switch body forms a convex pressing surface, the bottom surface of the switch body is a contact surface, and a sunken positioning blind hole is provided in the middle of the pressing surface. The switch body and the fixed legs are integrally cut and stamped stainless steel structures, and the switch body and each fixed leg are provided with a metal coating on the outside. The travel range of the switch body is 0.30mm-0.40mm, the thickness range of the switch body and the fixed legs is 0.01mm-0.07mm, the overall height range of the switch body is 0.34mm-0.44mm, the distance between two adjacent fixed legs is 4.6mm-4.8mm, and the distance between the fixed legs on two opposite sides is 6.8mm-7.0mm.

[0007] As a further solution of the present invention, the metal coating plated on the outside of the switch body and the fixing leg is a silver coating structure.

[0008] As a further solution of the present invention, the diameter range of the positioning blind hole is 0.30mm-0.40mm.

[0009] As a further solution of the present invention, the downward protrusion length of the positioning blind hole is 0.01mm-0.02mm.

[0010] As a further solution of the present invention, the pressing force range of the switch body in one stroke is 40g-60g.

[0011] As a further solution of the present invention, the switch body and the fixing foot are an integrally stamped 301 stainless steel substrate structure.

[0012] The beneficial effects of the present invention are as follows: The manufacturing process of a push-button touch switch using a stainless steel substrate proposed in the present invention is to use stainless steel (301) as the substrate to form a switch body with fixed feet through an integrated stamping process, and after a gold-plated layer, the entire switch has ultra-thin characteristics while meeting ultra-long service life and consistent travel (consistent hand feel). The one-time stamping overall process is simple, does not involve a complex debugging process of silicone, and eliminates the problems of rapid aging, easy deformation, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the technical solutions of the present invention or the technical solutions of the present invention in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the technical solutions of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0014] Figure 1 It is a schematic diagram of the process implementation process of the present invention.

[0015] Figure 2 It is a schematic diagram of the overall planar structure of the switch body and various components in the present invention.

[0016] Figure 3 It is an enlarged schematic diagram of the plane structure on one side of the switch body and the positioning blind hole in the present invention.

[0017] Figure 4 This is a schematic diagram of the performance test performed in the present invention.

[0018] Figure 5 This is a schematic diagram of the life test performed in the present invention.

[0019] Figure 6 It is a schematic diagram of the change of the stroke pressure curve of the switch body of the present invention.

[0020] Label name Label name 1 Switch body 12 Bending part 10 Positioning blind holes 13 Pressing surface 11 Fixed feet 14 Contact surface DETAILED DESCRIPTION

[0021] as follows: Please see attached Figure 1-6 , Manufacturing process of push-button touch switch using stainless steel substrate: Substrate processing: After the stainless steel substrate is initially inspected, it is stamped and formed, and its thickness is maintained between 0.01mm-0.07mm. After the sheet substrate is sampled, the substrate is cut to form a single switch body 1; cleaning process: After each formed switch body 1 is cleaned, a metal infiltration silver plating layer is performed at a temperature of 20-25°C and a duration of 5-10min; performance testing process: after the plating is completed, a performance test is performed, and a 2.0mm diameter aluminum round head is used for a downward pressure test (a 2.0mm diameter aluminum round head is used before the product test). .0mm aluminum flat head, the force is twice the pressing force of the product, vertically align it with the center of the product and press it 5 times, and then test it after its performance is stable. Special metal fixtures should be used to test the product. The fixture must be clean and flat, and there must be no bumps. Otherwise, it will have a great impact on the accuracy of the product performance test), and the downward pressure should be maintained at twice the pressing force range of one stroke, and the number of times should be 5 times (the impact force must be twice the pressing force of the product, and an aluminum flat head with a diameter of 1.0mm is used to vertically align the center of the product, and the impact speed is 120 times / minute. The base for fixing the product must be clean and flat, and there must be no bumps, deformations, or soft materials. Otherwise, it will have a great impact on the life of the product); service life test process, use an aluminum flat head with a diameter of 1.0mm to vertically align the center of the switch body 1 and strike at a speed of 120 times / min; spot check the discharge; and unload and package after the final spot check.

[0022] The main structure includes a circular switch body 1, and a fixed foot 11 arranged on the outer edge of the switch body 1, and the fixed foot 11 is arranged with four end points extending from the intersection of two perpendicular diameter lines of the switch body 1, and the junction between the switch body 1 and the fixed foot 11 is a bent portion 12 bent in the pressing direction, a raised pressing surface 13 (for connecting with an external fixing part, such as a key cap) is formed on the surface of the switch body 1, and the bottom surface of the switch body 1 is a contact surface 14 (for contacting and conducting with a PCB), and a sunken positioning blind hole 10 is provided in the middle of the pressing surface 13, and the switch body 1 and the fixed foot 11 are integrally cut and stamped. The switch body 1 and the fixed legs 11 are made of stainless steel and are formed as a whole by stamping. The switch body 1 and the fixed legs 11 are provided with metal plating on the outside. The travel range of the switch body 1 is 0.30mm-0.40mm. The thickness range of the switch body 1 and the fixed legs 11 is 0.01mm-0.07mm. The overall height range of the switch body 1 is 0.34mm-0.44mm. The distance between two adjacent fixed legs 11 is 4.6mm-4.8mm, and the distance between the two opposite fixed legs 11 is 6.8mm-7.0mm.

[0023] Here’s how it works: The switch body 1 with fixed feet 11 is made of stainless steel (301) as a base material by one-piece stamping. It not only has good conductivity, but also does not require the complicated silicone preparation and conductive layer setting procedures of silicone keys. It is also ultra-thin, has a long service life, and is excellent in quietness. It is suitable for a variety of electronic devices, such as computer keyboards, high-precision output devices, or scenes that require high quietness during input. The base material is made of 301 stainless steel, which has strong rebound performance, and is additionally plated with a silver layer (or gold layer) on the outside to further enhance the conductive performance.

[0024] In a preferred embodiment of the present invention, the metal coating on the outside of the switch body 1 and the fixed leg 11 is a silver coating structure.

[0025] A preferred embodiment of the present invention: the diameter of the positioning blind hole 10 ranges from 0.30 mm to 0.40 mm.

[0026] The diameter range of the positioning blind hole 10 is sufficient for installing and fixing the fixed parts (such as key caps, etc.) of most devices, and because it is made of metal, it has excellent anti-falling properties after being fixed.

[0027] A preferred embodiment of the present invention: the downward protrusion length of the positioning blind hole 10 is 0.01mm-0.02mm.

[0028] A shallower blind hole is used, and the key cap can be connected to the blind hole by gluing.

[0029] A preferred embodiment of the present invention: the pressing force range of the switch body 1 in one stroke is 40g-60g.

[0030] The stroke pressure of the switch body 1 involved in this solution is 40g-60g, which is a relatively moderate pressing pressure, and due to the structural characteristics, the pressure (feel) can still be maintained after a long period of use (5-10 million times).

[0031] The above description is only a preferred embodiment of the technical solution of the present invention, and does not limit the patent scope of the technical solution of the present invention. All equivalent structural changes made by using the contents of the technical solution description and drawings of the present invention under the conception of the technical solution of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the technical solution of the present invention.

Claims

1. A manufacturing process for a push-button touch switch using a stainless steel substrate, characterized in that: The processing methods include: S1. Substrate processing, After the stainless steel substrate is initially inspected, it is stamped and formed, and its thickness is kept between 0.01mm-0.07mm. After the sheet substrate is sampled, the substrate is cut to form a single switch body; S2, cleaning process, After cleaning the molded switch bodies, the temperature is 30-60°C; S3, performance testing process, After the coating is completed, the performance test is carried out, and a 2.0mm diameter aluminum round head is used for the downward pressure test, and the downward pressure is maintained at twice the pressure range of one stroke, and the number of times is 5; S4, service life test process, Use an aluminum flat head with a diameter of 1.0 mm to vertically aim at the center of the switch body and strike at a speed of 120 times / min; S5. Sample outflow inspection; After the final random inspection, the materials are unloaded and packaged.

2. The manufacturing process of a key-touch switch using a stainless steel substrate according to claim 1, characterized in that: The key-touch switch structure comprises a circular switch body and a fixed foot arranged on the outer edge of the switch body, wherein the fixed foot is arranged with four end points extending from two perpendicular diameter lines of the switch body, and the junction between the switch body and the fixed foot is a bent portion bent in the pressing direction, a convex pressing surface is formed on the surface of the switch body, the bottom surface of the switch body is a contact surface, and a sunken positioning blind hole is provided in the middle of the pressing surface. The switch body and the fixed legs are integrally cut and stamped stainless steel structures, and the switch body and each fixed leg are provided with a metal coating on the outside. The travel range of the switch body is 0.30mm-0.40mm, the thickness range of the switch body and the fixed legs is 0.01mm-0.07mm, the overall height range of the switch body is 0.34mm-0.44mm, the distance between two adjacent fixed legs is 4.6mm-4.8mm, and the distance between the fixed legs on two opposite sides is 6.8mm-7.0mm.

3. The manufacturing process of a key-touch switch using a stainless steel substrate according to claim 2, characterized in that: The metal coating plated on the outside of the switch body and the fixing leg is a silver coating structure.

4. The manufacturing process of a key-touch switch using a stainless steel substrate according to claim 2, characterized in that: The diameter of the positioning blind hole ranges from 0.30 mm to 0.40 mm.

5. The manufacturing process of a key-touch switch using a stainless steel substrate according to claim 2, characterized in that: The downward protrusion length of the positioning blind hole is 0.01mm-0.02mm.

6. The manufacturing process of a key-touch switch using a stainless steel substrate according to claim 2, characterized in that: The pressing force range of the switch body in one stroke is 40g-60g.

7. The manufacturing process of a key-touch switch using a stainless steel substrate according to claim 2, characterized in that: The switch body and the fixing foot are an integrally stamped 301 stainless steel substrate structure.

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