CN101049739A

CN101049739A - Method for fabricating keyboard by combining with decoration technique inside mold, and the keyboard

Info

Publication number: CN101049739A
Application number: CN 200610073271
Authority: CN
Inventors: 叶志峰; 黄任民
Original assignee: Wistron Corp
Current assignee: Wistron Corp
Priority date: 2006-04-06
Filing date: 2006-04-06
Publication date: 2007-10-10
Anticipated expiration: 2026-04-06
Also published as: CN100548654C

Abstract

A technology for preparing the keyboard with higher keys and small gap between keys by in-mould decoration (IMD) technique includes such steps as preparing a plastic membrane with multiple bosses by IMD or injection moulding, cutting to become multiple bosses blocks, and binding the bottoms of multiple bosses onto an elastic layer to form a keyboard. Said keyboard is also disclosed.

Description

The method of fabricating keyboard by combining with decoration technique inside mold and this keyboard

Technical field

The present invention relates to a kind of keyboard, particularly relate to in-mold decoration (IMD, In-MoldDecoration) method of fabrication techniques keyboard.

Background technology

Personal assistant (PDA) or intelligent mobile phone portable type electronic products such as (Smart phone) mostly disposes miniature keyboard, carries out the control operation of electronic product and the usefulness of input data for the user.Miniature keyboard with in-mold decoration, injection molding technology making, be numeral, the symbol of the multiple color of printing on the film on button top layer, and not needing after forming button, to carry out again the printing of multiple tracks, its making is comparatively convenient, and makes the color of numeral, symbol of printing more diversified.

The patents that many relevant compound buttons are arranged, for example those disclosed herein such as Taiwan patent announcement No. 465792, No. 465795, No. 470208 and No. 490069.Wherein No. the 490069th, the Taiwan patent announcement, disclose a kind of compound button, it is after literal, symbol or pattern are oppositely indicated in the one side printing of a polyester sheet, insert compression moulding in the mould, and at the surperficial protuberance that forms button of polyester sheet, then in the protuberance inboard of polyester sheet in conjunction with thermoplasticity elastoplast (TPE), in order to appropriate elasticity and pressing touch to be provided.

See also shown in Figure 1.Generally be earlier carrying out utilizing vacuum to take out the mould that draws again after the printshop needs the numeral, symbol of color on the PC film (Polycarbonate, polycarbonate membrane) 10, make PC film 10 form some protuberances 11, with usefulness as button; Place filling PC material in the mould again in the inside of protuberance 11, die cut PC film 10 forms the external form of keyboard again.

Present electronics and IT products, under compact demand, often need be in certain area ccontaining many buttons, perhaps the quantity of button is few, but under the requirement of satisfying consumer's sense of touch, must improve the height of button.But take out the mode of drawing with vacuum and make PC mould formation protuberance 11 as shown in Figure 1, the height B of protuberance 11 is relevant with the ratio between the spacing A, is generally B: A=1: 1, be B to the maximum: A=1: 0.8.But the height of B mostly is 4 millimeters (mm) most, and is too high, and the PC film 10 on protuberance 11 tops can break.If we need the height B of protuberance 11 is 3 millimeters, then needing spacing A is 2.4 millimeters, but with the general miniature keyboard of personal assistant or intelligent mobile phone, the gap between its button generally has only the 1.5-1.8 millimeter, only can produce highly to be the button of 1.9-2.3 millimeter.Therefore, be with present film interior trim, injection molding technology, making has low gap but the keyboard of highly higher button is also infeasible.

Summary of the invention

In order to utilize in-mold decoration, injection molding technology, the higher and less keyboard of spacing between button of the height of making button, and the present invention is proposed.

Method and this keyboard of the keyboard that the higher gap of height that main purpose of the present invention is to provide a kind of combining with decoration technique inside mold to make button is less, make keyboard under the restriction of little steric requirements, can cooperate film interior trim, injection molding technology to make the higher button of button height.

Method and this keyboard of the keyboard that the higher gap of height that another object of the present invention is to provide a kind of combining with decoration technique inside mold to make button is less can be convenient with in-mold decoration, the higher button of injection molding technology making, can satisfy the demands of consumers.

The method of the keyboard that the higher gap of height of combining with decoration technique inside mold making button of the present invention is less comprises the steps:

(1) makes a plastic foil with a plurality of protuberances be placed into one and cut in the tool, croppedly go out a plurality of protuberance particles; Wherein this plastic foil with a plurality of protuberances is by with film interior trim, injection molding technology producer, and these a plurality of protuberance inner filling plastic materials, and has first spacing between these a plurality of protuberances;

(2) these a plurality of protuberance particles are placed in a plurality of grooves in conjunction with tool, have second spacing between these a plurality of grooves; Wherein this second spacing is less than this first spacing;

(3) base that makes these a plurality of protuberance particles has this second spacing in conjunction with an elastomeric layer between these a plurality of protuberance particles; The less keyboard in the higher gap of height that makes this elastomeric layer form a button in conjunction with these a plurality of protuberance particles.

Can further comprise in this step (3) and cut this elastomeric layer to form this keyboard.

This plastic foil is a polycarbonate membrane; This plastic material is a makrolon material; This elastomeric layer is a rubber layer.

Can comprise further in this step (3) that the base that makes a plurality of protuberance particles is coated with this elastomeric layer of pressing behind the ultraviolet resin; The irradiation ultraviolet radiation lamp makes this ultraviolet ray resin solidification again, makes this elastomeric layer in conjunction with this each protuberance particle; Or utilize adhesive agent to make elastomeric layer cohere this each protuberance particle.

In this step (1) this has the plastic foil of a plurality of protuberances, by with the following steps producer:

(a) make this plastic foil with film interior trim, injection molding technology; This plastic foil has a plurality of protuberances; Has this first spacing between these a plurality of protuberances;

(b) this plastic foil is placed in the injection mold; In this injection mold, make the protuberance inside of plastic material filling in this plastic foil.

A kind of keyboard of the present invention is that comprise: an elastomeric layer is in conjunction with a plurality of protuberance particles, and the surface of these a plurality of protuberance particles is a plastic foil with the method manufacturing person of the less keyboard in the higher gap of height of above-mentioned combining with decoration technique inside mold making button; The inner filling plastic material of a plurality of protuberance particles; Wherein this plastic foil is a polycarbonate membrane; This plastic material is a makrolon material; This elastomeric layer is a rubber layer; Be to combine between this elastomeric layer and these a plurality of protuberance particles wherein with ultraviolet resin.

Other purpose of the present invention, effect see also graphic and embodiment, are described in detail as follows.

Description of drawings

Fig. 1 is for having the schematic diagram of the PC film made from in-mold decoration, injection molding technology with some protuberances now;

Fig. 2 A to Fig. 2 G is the schematic diagram of each step of the embodiment of the invention;

Fig. 3 is a flow chart of the present invention.

The main element symbol description

10PC film 11 protuberances

20PC film 21 protuberances

211 first spacing 22PC materials

221 grooves, 23 protuberance particles

230UV resin 231,332 second spacings

24 rubber layers, 241 protuberances

31 injection molds, 311 injection channel

32 cut mould 33 in conjunction with tool

331 grooves, 50 keyboards

The specific embodiment

See also Fig. 2 A-Fig. 2 G, shown in Figure 3.The embodiment of the method for the keyboard that the higher gap of height of combining with decoration technique inside mold making button of the present invention is less comprises the steps:

Step 41 is made PC film 20 with film interior trim, injection molding technology; PC film 20 has a plurality of protuberances 21; The height of protuberance 21 meets desired height; Has the first bigger spacing 211 between a plurality of protuberances 21, shown in Fig. 2 A;

Step 42 is placed in the injection mold 31 PC film 20; In injection mold 31, make PC material 22 via protuberance 21 inside of injection channel 311 fillings, and make the base of PC material 22 corresponding each protuberance 21 be formed with a groove 221, shown in Fig. 2 B in PC film 20;

Step 43 is placed into the PC film 20 in conjunction with PC material 22 and cuts in the tool 32, shown in Fig. 2 C, croppedly goes out a plurality of protuberance particles 23; The surface of protuberance particle 23 is a PC film 20; The inner filling PC material 22 of protuberance particle 23 is shown in Fig. 2 D;

Step 44 is placed in a plurality of grooves 331 in conjunction with tool 33 a plurality of protuberance particles 23, has the required second less spacing 332 between a plurality of grooves 331, shown in Fig. 2 E;

Step 45 makes base coating UV (ultraviolet ray) the resin 230 back pressings one rubber layer 24 elastomeric material layers of a plurality of protuberance particles 23, rubber layer 24 has the protuberance 241 in the groove 221 that is buckled in protuberance particle 23, shown in Fig. 2 F, shine the UV lamp again, UV resin 230 is solidified, rubber layer 24 cuts rubber layer 24 to form a required keyboard 50, shown in Fig. 2 G promptly in conjunction with a plurality of protuberance particles 23 with second less spacing 231.When if the apparent size of rubber layer 24 meets demand, promptly need not cut the operation of rubber layer 24.

PC film 20 of the present invention also can be the film that polyester film or other plastic material are made.

The present invention makes the structure of protuberance particle 23 bound rubber layers 24, except the above-mentioned bound fraction coating UV resin 230 that makes protuberance 23 and rubber layer 24, again rubber layer 24 is put into fit tightly in conjunction with tool and protuberance particle 23 after, irradiation ultraviolet radiation (UV) lamp solidifies UV resin 230, make outside the structures that protuberance particle 23 and rubber layer 24 firmly combine, the structure that also available adhesive agent coheres, or with known combined structures such as groove 221, protuberance 241 fastening structures.

The present invention makes and utilizes in-mold decoration, injection molding technology, and the height of making button is higher and the less keyboard of spacing between button becomes feasible, and conveniently makes the keyboard that can satisfy the required button height of consumer with in-mold decoration, injection molding technology.

Above put down in writing only for utilizing the embodiment of the technology of the present invention content, anyly be familiar with modification, the variation that this operator uses the present invention to do, all belong to the present invention's content required for protection, and be not limited to those disclosed embodiments.

Claims

1. a combining with decoration technique inside mold is made the method for the less keyboard in the higher gap of height of button, comprises the steps:

2. the method for the keyboard that the higher gap of height of combining with decoration technique inside mold making button as claimed in claim 1 is less wherein further comprises in this step (3) cutting this elastomeric layer to form this keyboard.

3. the method for the keyboard that the higher gap of height of combining with decoration technique inside mold making button as claimed in claim 1 is less, wherein this plastic foil is a polycarbonate membrane; This plastic material is a makrolon material; This elastomeric layer is a rubber layer.

4. combining with decoration technique inside mold as claimed in claim 1 is made the method for the less keyboard in the higher gap of height of button, comprises further in this step (3) that wherein the base that makes a plurality of protuberance particles is coated with this elastomeric layer of pressing behind the ultraviolet resin; The irradiation ultraviolet radiation lamp makes this ultraviolet ray resin solidification again, makes this elastomeric layer in conjunction with this each protuberance particle.

5. the method for the keyboard that the higher gap of height of combining with decoration technique inside mold making button as claimed in claim 1 is less wherein utilizes adhesive agent to make elastomeric layer cohere this each protuberance particle in this step (3).

6. combining with decoration technique inside mold as claimed in claim 1 is made the method for the less keyboard in the higher gap of height of button, and wherein this in this step (1) has the plastic foil of a plurality of protuberances, by with the following steps producer:

7. combining with decoration technique inside mold as claimed in claim 6 is made the method for the less keyboard in the higher gap of height of button, wherein further makes this plastic material that base that should each protuberance is formed a groove in this step (b); This elastomeric layer has the protuberance corresponding to this each groove in this step (b); This each protuberance is buckled in this each groove.

8. combining with decoration technique inside mold as claimed in claim 7 is made the method for the less keyboard in the higher gap of height of button, comprises further in this step (3) that wherein the base that makes a plurality of protuberance particles is coated with this elastomeric layer of pressing behind the ultraviolet resin; The irradiation ultraviolet radiation lamp makes this ultraviolet ray resin solidification again, makes this elastomeric layer in conjunction with these protuberance particles.

9. the method for the keyboard that the higher gap of height of combining with decoration technique inside mold making button as claimed in claim 8 is less, wherein this plastic foil is a polycarbonate membrane; This plastic material is a makrolon material; This elastomeric layer is a rubber layer.

10. keyboard, it is the method manufacturing of making the higher gap of height of button less keyboard with combining with decoration technique inside mold as claimed in claim 1, comprise: an elastomeric layer is in conjunction with a plurality of protuberance particles, and the surface of these a plurality of protuberance particles is plastic foils; The inner filling plastic material of a plurality of protuberance particles.

11. keyboard as claimed in claim 10, wherein this plastic foil is a polycarbonate membrane; This plastic material is a makrolon material; This elastomeric layer is a rubber layer.

12. keyboard as claimed in claim 11 is to combine with ultraviolet resin between this elastomeric layer and these a plurality of protuberance particles wherein.