WO2010066099A1

WO2010066099A1 - Computer keypad and molding process

Info

Publication number: WO2010066099A1
Application number: PCT/CN2009/001389
Authority: WO
Inventors: 杨新川
Original assignee: 嘉兴淳祥电子科技有限公司
Priority date: 2008-12-09
Filing date: 2009-12-08
Publication date: 2010-06-17
Also published as: WO2010066099A8; CN101414518B; CN101414518A

Abstract

A keystoke structure of a computer keypad, includes: a thin film circuitry placed on a substrate, the thin film circuitry formed by an upper circuitry and a lower circuitry, wherein: a metallic elastic piece layer is arranged under a key cap layer comprised by the key caps, a corresponding metallic elastic piece is accordingly below each key cap. There is a layer of a light guide plate between the key cap layer and the metallic elastic piece layer, the side of the light guide board is provided with a light source. The thin film circuitry is arranged under the metallic elastic piece layer, and each metallic elastic piece accordingly has a corresponding conduction point printed on the thin film circuitry. The key cap layer is integrally formed by UV light curing. The thin film circuitry is a thin film circuitry having the same direction structure. The production process of the computer keyboard includes: adopting the integrally formed mode of the UV light to produce the key caps, producing the thin film circuitry having the same direction, arranging the metallic elastic piece, and attaching the key caps, the metallic elastic piece and the thin film circuitry together in turn.

Description

Computer keyboard and molding process

Technical field

The invention relates to a computer keyboard and a molding process. Background technique

The existing computer keyboard is composed of a substrate, a film line, a cross bracket, a silicone rubber, and a keycap. When assembling, the film circuit is first placed on the substrate, then the silicone rubber is placed, and the cross brackets are inserted into the substrate one by one. Finally, the key caps are respectively stuck on the corresponding brackets. The entire assembly process is too complicated and requires a lot of manpower to complete, and it is impossible to mechanize production, resulting in low production efficiency. Summary of the invention

The invention provides a computer keyboard and a molding process, aiming at solving the prior art problems, and provides a computer keyboard and a production process which are simple in structure, convenient to install, can be mechanized to improve production efficiency.

The technical solution adopted by the present invention to solve the problem is:

The keyboard structure of the computer keyboard has a substrate, a film line, a key cap, and the film circuit is disposed on the substrate, and the film circuit is composed of an upper line and a lower line, wherein the key cap layer is provided with a metal elastic layer under each of the keycap layers. There is a corresponding metal shrapnel under the key caps. The keycap layer is integrally molded by ultraviolet light curing. The film lines are disposed under the metal shrapnel layer, and each of the metal shrapnels correspondingly has a conductive dot printed on the film line.

A light guide plate is further disposed between the key cap layer and the metal dome layer, and a light source is disposed on a side of the light guide plate.

1

Replacement page (Article 26) The light source is an LED light.

The film line is a film line having a co-directional structure, and conductive dots on the upper circuit board and the lower circuit board are printed on the upper surface thereof.

The upper circuit board is provided with a plurality of through holes, and the outer side of each of the through holes is printed with a conductive point; the conductive points of the lower circuit board correspond to the through holes of the upper circuit board, and the conductive points are located within the circumference of the through hole After the upper and lower circuit boards are combined, the conductive points are located in the through holes.

The production process of the computer keyboard:

1. The key cap layer is formed by ultraviolet light curing once;

The ultraviolet curing molding glue is injected into the key cap mold, the mold is filled, the surface of the mold is covered with a film, and the coated mold is cured under ultraviolet light, and the ultraviolet light energy is 700-100 mJ, the ultraviolet The light energy is preferably 800 mJ; the key cap layer is demolded and molded, and the characters are printed on the back side of the key cap layer, that is, the key cap is punched.

Second, the production of film lines;

(1) Upper circuit board: Several through holes are opened in the upper circuit board, and then conductive dots are printed on the upper surface thereof, and conductive dots are located on the outer side of each through hole.

(2) Lower circuit board: Conductive dots are printed on the surface of the lower circuit board. The position of the conductive dots corresponds to the position of the through hole of the upper circuit board, and the conductive dots are located within the circumference of each through hole.

(3) Combine the upper and lower circuit boards, and the conductive points on the two circuit boards are in the same direction.

(4) The combined film line is punched with a mold.

Third, the fit metal shrapnel:

Place the metal shrapnel in the mold, and place it according to the position of the button. Fourth, print the light guide plate, and then punch the shape.

5. Combine the well-formed film line and the finished metal shrapnel and light guide plate in turn, print the ultraviolet light adhesive on the side of the key cap layer printed with characters, and paste the key cap layer on the light guide plate. The light panels are combined.

The invention has the advantages that the computer keyboard is simple, the structure of the cross bracket and the silicone rubber are not included in the structure, and the key cap is integrally formed, thereby eliminating the process of installing one by one, saving time. The layers of the keyboard structure can be mechanized only by sticking to each other, thereby improving production efficiency. DRAWINGS

Figure 1 is a schematic view of the structure of the present invention

2 is a schematic structural view of a single button of the present invention

Figure 3 is a schematic view of the structure of the film line

4 is a layout view of a light source on a side of a light guide plate.

The invention is further described below in conjunction with the drawings and specific embodiments.

As shown in Fig. 1, Fig. 2, and Fig. 3, the keyboard structure of the computer keyboard has a substrate 50. The keycap layer 10 formed by the keycap 1 is integrally formed by ultraviolet curing, and a metal elastic layer 30 is disposed under the keycap layer 10. Each of the keycaps 1 has a corresponding metal dome 3 corresponding thereto. A thin film line 40 is disposed under the metal shrapnel layer 30.

3

Replacement page (Article 26) The film line 40 is composed of an upper line 41 and a lower line 42. Each of the metal domes 3 correspondingly has a conductive point 4, 5 printed on the upper circuit board 41 and the lower circuit board 42, and the film line 40 is placed on the substrate 50. . Since there is no cross bracket and silicone rubber in the structure, space is saved, so different devices can be placed under the keycap 1 according to actual needs to facilitate the user. As shown in FIG. 1 and FIG. 4, the light guide plate 20 is disposed under the keycap 1, and the LED light 2 as a light source is disposed on the side of the light guide plate 20, so that the keyboard can be illuminated, which is convenient for the user to use in a dark environment; The light guide plate 20 is replaced with a capacitance sensor, and the key cap 1 can be used to perform circumferential, vertical sliding, and handwriting operations on the surface of the keycap 1.

In this embodiment, since the metal dome 3 is used instead of the silicone rubber, in order to bring the pressing force of the keyboard to a predetermined value, the film line 40 is a film line having the same structure, and the conductive dots 4 and the lower circuit board 42 of the upper circuit board 41. The conductive dots 5 are printed on the upper surface of the wiring board. A plurality of through holes 6 are formed in the upper circuit board 41, and conductive dots 4 are printed on the outer side of the through holes 6. The metal domes 3 are in contact with the conductive dots 4; the conductive dots 5 of the lower circuit board 42 and the upper circuit boards 41 are through holes. Correspondingly, the conductive dots 5 are located within the circumference of the through hole 6. After the upper and lower circuit boards 41, 42 are combined, the conductive dots 5 are placed in the through holes 6.

Although the keycap layer 10 is molded by ultraviolet light once, the material used has excellent flexibility, and the keycap 1 does not affect the keycap 1 during operation. When the keyboard is used, the keycap 1 is pressed, and the metal dome 3 is pressed to be in contact with the conductive dots 5 of the lower circuit board 42, since the metal domes 3 are also in contact with the conductive dots 4 of the upper circuit board 41, thereby The upper and lower lines 41, 42 are turned on.

The production process of the above computer keyboard is as follows:

1. The key cap layer is formed by ultraviolet light curing once;

Injecting the UV curable molding glue into the key cap mold, filling the mold, and covering the surface of the mold with a film, which can be selected according to requirements, using a polyurethane film or a polycarbonate film,

4

Replacement page (Article 26) In the embodiment, in order to make the formed button have good flexibility, a polyurethane film is used. The film after curing is cured under ultraviolet light, and the ultraviolet light energy is 700-100 mJ; the key cap layer is demoulded and demolded, and characters are printed on the back side of the key cap layer, that is, one side of the cover film; . The ultraviolet light energy is preferably 800 mJ.

Second, the production of film lines;

(4) The combined film line is punched with a mold.

Third, the fit metal shrapnel:

The metal shrapnel is placed in the mold, and is formed according to the position of the button, and the single-sided adhesive sheet is attached to the finished metal shrapnel so that the two are attached to each other.

Fourth, print the light guide plate, and then punch the shape.

The keyboard of the computer keyboard has a simple structure, and the structure has no cross bracket and silicone rubber, and the key cap is integrally formed, which saves time by installing the one by one. The layers of the keyboard structure can be pasted only by sticking to each other, and the entire assembly process can realize mechanized production and improve production efficiency. Replacement page (Article 26)

Claims

Claim

1. The keyboard structure of the computer keyboard has a substrate, a film line, a key cap, and the film line is placed on the substrate, and the film circuit is composed of an upper line and a lower line, and is characterized in that: a metal dome layer is arranged under the keycap layer formed by the key cap There is a corresponding metal shrapnel under each of the key caps, and the key cap layer is integrally formed by ultraviolet curing; the film lines are disposed under the metal shrapnel layer, and each metal shrapnel is correspondingly printed on the film line. Conductive points on.

2. The computer keyboard key structure according to claim 1, wherein: a light guide plate is further disposed between the key cap layer and the metal dome layer, and a light source is disposed on a side of the light guide plate.

3. The computer keyboard key structure according to claim 2, wherein: the light source is a L E D lamp.

4. The computer keyboard key structure according to claim 1, wherein: said film line is a film line having a co-directional structure, and conductive dots on the upper circuit board and the lower circuit board are printed on the upper surface thereof.

5. The computer keyboard key structure according to claim 4, wherein: the upper circuit board is provided with a plurality of through holes, and the outer side of each of the through holes is printed with a conductive point; the conductive point of the lower circuit board and the upper line The through holes of the plates are corresponding one by one, and the conductive points are located in the circumferential range of the through holes, and after the upper and lower circuit boards are combined, the conductive points are located in the through holes.

6. The process for producing a computer keyboard according to claim 1, wherein:

First, the production of the keycap layer, the production of the keycap layer is formed by ultraviolet curing:

The ultraviolet curing molding glue is injected into the key cap mold, the mold is filled, the surface of the mold is covered with a film, and the coated mold is cured under ultraviolet light, and the ultraviolet light energy is 700-100 mJ; the key cap layer After solidification molding, the mold is released, and characters are printed on the back side of the keycap layer, that is, on the side of the cover film; after the keycap layer is punched, the ultraviolet light adhesive is printed on the side of the keycap layer printed with characters, and the keycap layer is pasted on the keycap layer. The metal shingles of the fixed metal shrapnel are combined with the metal shrapnel.

Second, the production of film lines;

(1) printing conductive dots on the upper circuit board and the lower circuit board;

(2) Combine the upper and lower circuit boards together, and combine the film lines with the mold to punch the shape; 3. Fit the metal shrapnel:

The metal shrapnel is placed in the mold, and is formed according to the position of the button, and the single-sided adhesive sheet is attached to the finished metal shrapnel so that the two are attached to each other;

Fourth, printing the light guide plate, and then punching the shape;

5. Combine the well-formed film lines and the finished metal shrapnel, light guide plate and keycap.

The process of producing a computer keyboard according to claim 6, wherein: the process of the film circuit further comprises:

( la) upper circuit board: several through holes are opened in the upper circuit board, conductive dots are printed on the surface of the circuit board, and conductive points are located on the outer side of each through hole;

( lb) Lower circuit board: Print conductive points on the surface of the lower circuit board. The position of the conductive points corresponds to the position of the through hole of the circuit board, and the conductive points are located within the circumference of each through hole, and the upper and lower circuit boards are combined. Together, the conductive points on the two boards are in the same direction.

The process for producing a computer keyboard according to claim 6, wherein the ultraviolet light energy is 800 mJ.