CN100440405C

CN100440405C - A making method for thin key

Info

Publication number: CN100440405C
Application number: CNB2005101376342A
Authority: CN
Inventors: 黄秋永
Original assignee: Yijia Science & Technology Co Ltd
Current assignee: Yijia Science & Technology Co Ltd; Ichia Technologies Inc
Priority date: 2005-12-26
Filing date: 2005-12-26
Publication date: 2008-12-03
Anticipated expiration: 2025-12-26
Also published as: CN1996524A

Abstract

This invention relates to electron product film key process method, which adds ultraviolet fix resin onto film and comprises the following steps: the resin is filled into multiple tank holes on mode top; mode tank hole top non-tank area is coated with light resistance layer and then injecting ultraviolet fix resin and pressing the round wheel for film coverage; then casting the ultraviolet light into bottom to harden the resin onto film layer; but the resistance layer mask part is kept as liquid shape.

Description

Making method for thin key

Technical field

The present invention relates to a kind of manufacture method that is used for the device on the electronic product, relate in particular to the making method for thin key of the input unit that shows character, symbol, numeral etc. on the electronic product.

Background technology

Generally speaking, the switch of mobile communication products such as portable phone, pouch-type electronic notebook, measuring instrument or remote controllers is that the button that one group of plastic material with numeral, symbol or character etc. is made is set on circuit board, operates electronic instrument with push switch.Because the progress of manufacture of semiconductor and electronics technology, electronic product be toward compact development, especially in portable product, the more main demand of light and handy exquisiteness.In order to satisfy these demands, slight keyboard becomes more important.

In recent years, keyboard button is many to be made by the translucent resin material, and is overlying on its bottom surface with one deck printed layers.Be printed on numeral, character and symbol etc. on this printed layers, can protect printed layers in order to the button that resin material etc. is made, make its not reason use wearing and tearing for a long time or peel off and be difficult for identification.In addition, button is pursued attractive in appearance and high texture, and to have with the LED lamp be the backlight mode of light source more.

Thermoplastic resins such as the many polyester of above-mentioned push-button switch, Merlon, allyl resin by light transmission, or thermosetting resins such as silicones, potassamide acid esters, unsaturated polyester (UP), vinyl acetate, propylene ester are made with mode moulding such as injection moulding, extrusion modling or castings.

As mentioned above, the pattern relief that metal level constituted in modes such as sputter or evaporations of traditional keyboard is in the surface of resin button.Yet the metal level of these symbols or character is thinner, therefore makes the metal level wearing and tearing until disappearance easily because push keyboard for a long time.

In order to address this problem, the surface of metal level needs armor coated again, or metal level is engraved on the back side of resin bed.The former often has dust to adsorb on it when coating metal layer, and the latter is then broken because resin is crooked easily, and in addition, the cost of these methods is higher.

Also has another kind of keyboard manufacturing method, labels such as character directly form coated with one deck printed layers in the button bottom surface, therefore, how pattern to be printed on the printed layers traditionally, thereafter more thereon the key setting with silk screen printing or mobile printing technology such as (tempoprinting).When light source penetrates from the keyboard bottom surface, character on the printed layers or color can clearly see from button top, thereby form a kind of keyboard of high texture.

Yet this manufacture method need consider between printed layers and the button that because of engaging or fit bad peeling off of causing, therefore, the compatibility between cement and the resin material needs careful consideration.In addition, button is thin more, and the also difficult more formation of the chamfering of its periphery or other pattern needs to realize originally with bigger one-tenth.Therefore, traditional method needs to accept or reject between slimming and moulding.

Summary of the invention

For with product marketization, the keyboard button of electronic product requires exquisite shallow more.Main purpose of the present invention is to provide a kind of manufacture method of slim keyboard button group.The invention provides a kind of manufacture method, UV-cured resin (UV glue is called UV glue again or does not have shadow glue) is annotated in the mould slotted eye of prior forming, the sclerosis aftershaping is a button.Therefore, the thickness of button can be adjusted by the mould slotted eye according to user's demand.

Molding mode of the present invention is a button with the hardening of resin aftershaping, and its bottom is provided with thin layer, on it with the patterns such as symbol of mode the Show Buttons such as printing.Further, outward appearances such as the moulding of this button or chamfering all can realize easily by the shape that changes the mould slotted eye.Therefore, manufacture method of the present invention can reduce cost.Though known injection moulding method is also plastic chamfering is arranged, when button slimming more, it is also high more with specification requirement that it makes cost, therefore can not become the first-selected manufacture method of the marketization.

Making method for thin key of the present invention is by forming button with UV-cured resin, and its bottom surface constitutes coated with the thin film layer.Because UV-cured resin can be attached to thin layer, the dry and cracked or separation problem of sclerosis that forms when therefore not having cement that conventional keyboard need consider with button and thin layer gluing.Therefore another object of the present invention is to provide a kind of making method for thin key, can reduce do solid because of cement between button and the thin layer or with the incompatible problem of peeling off easily that produces of material.

From the above mentioned, the invention provides a kind of making method for thin key of electronic product, it constitutes for UV-cured resin is attached to thin layer.Wherein, UV-cured resin is filled in a plurality of slotted eyes that the front is offered on the tabular mould.Be coated with photoresist layer on the non-slotted eye zone in mould slotted eye front, afterwards, inject UV-cured resin, wait the compacting device coated with thin layer with the circle wheel again.After this, with ultraviolet light vertically from the incident of mould bottom surface, thereby make UV-cured resin sclerosis and be attached on the thin layer.But the part that covered by photoresist layer will remain liquid.Thin layer and UV-cured resin can be taken out in mould, and liquid UV-cured resin be removed, thereby form thin button in modes such as cleanings.

Description of drawings

Fig. 1 is a mould stereogram of the present invention;

Fig. 2 is the end view of mould of the present invention;

Fig. 3 is the partial enlarged drawing of Fig. 2;

Fig. 4 is the stereogram of printed layers of the present invention;

The application drawing that Fig. 5 combines with UV-cured resin for printed layers of the present invention;

Fig. 6 is the end view of printed layers of the present invention and mould applying;

Fig. 7 is a finished product stereogram of the present invention;

Fig. 8 is the printed layers of second embodiment of the invention and the end view that mould is fitted;

Fig. 9 is the finished product stereogram of second embodiment of the invention;

Figure 10 is the printed layers of third embodiment of the invention and the end view that mould is fitted;

Figure 11 is the finished product stereogram of third embodiment of the invention.

In the accompanying drawing, the list of parts of each label representative is as follows:

10-

mould

11,11a, 11b-slotted eye

13-location division 15-photoresist layer

30-thin layer 31-pattern district

33-location hole 40-cylinder

21,21a, 21b-button 20-UV-cured resin

50-suppresses tool

Embodiment

In order to make those skilled in the art further understand feature of the present invention and technology contents, see also following about detailed description of the present invention and accompanying drawing, accompanying drawing only provide with reference to and usefulness is described, be not to be used for limiting the present invention.

Fig. 1 is a mould stereogram of the present invention.As shown in Figure 1, first step of the present invention is to prepare one group of plate shape mould 10 that offers a plurality of slotted eyes 11, and the switch on the circuit board of slotted eye 11 and the keyboard (not shown) of electronic product is corresponding.Mould 10 is made up of the material that ultraviolet light can penetrate.In addition, first location division 13 is arranged on the mould 10.In the preferred embodiment shown in this figure, location division 13 is more than one reference column protruding on the front of mould 10.

Fig. 2 is the end view of mould of the present invention.Next step of the present invention is and will fills with UV-cured resin 20 in the slotted eye 11.At this moment, because the surface tension of ultraviolet curing resin material, therefore, the surface of UV-cured resin will outwards protrude from mould.

Fig. 3 is the part enlarged drawing of Fig. 2.As shown in the figure, the part beyond the upper surface of this mould is positioned at slotted eye is provided with one deck photoresist layer 15, and it is made of the impenetrable material of ultraviolet light.Photoresist layer 15 can be realized by two kinds of means: one is for to be coated with lighttight material at die surface; It is two for the light-resist plate that will have a pattern directly is attached at the surface of mould, and wherein, hollow out needs corresponding with slotted eye 11.

Fig. 4 is the stereogram of thin layer of the present invention.Be illustrated as thin layer 30, which is provided with pattern districts 31 more than one and slotted eye 11 corresponding settings.Because thin layer 30 is directly in order to the key pad (key pad) as keyboard, therefore, its shape needs corresponding with the circuit board (figure does not show) of electronic product keyboard.And pattern district 31 is formed at the pattern on the keyboard of electronic product (as character, numeral or symbol etc.) on the thin layer 30 by the mode of printing.

The application drawing that Fig. 5 combines with UV-cured resin for thin layer of the present invention.Cooperate Fig. 4, be scattered with more than one second location division 33 on the thin layer 30, first location division, the 13 corresponding settings on its essence and the mould 10.Therefore, second location division 33 is the location hole that is opened in the thin layer 30 in this preferred embodiment.

As shown in Figure 5, location hole needs at first to fasten with reference column, so that thin layer 30 is positioned on the mould 10.Afterwards, utilize exhaust mode to guarantee between thin layer and the UV-cured resin 20 without any residual air.In the present embodiment, exhaust mode rolls across thin layer 30 for utilizing the chewing gum and bubble gum 40 of rotating, so that thin layer 30 fits tightly with UV-cured resin 20.

Another kind of thin layer 30 with the locate mode of mould 10 is, is provided with telltale mark on mould 10, and the machine (not shown) of gripping film 30 is provided with arrangement for detecting, in order to finding out this mark, and aims at mould 10.

As shown in Figure 6, it is the end view of thin layer of the present invention and mould applying.As shown in the figure, thin layer 30 fits tightly on the UV-cured resin 20 of mould 10, can not produce any entrapped air pockets therebetween.Because UV-cured resin 20 fills with slotted eye 11, its be subjected to surface tension and the part of projection will because of the pressing overflow of cylinder 40 to mould 10 surfaces.Simultaneously, for making the thin layer 30 smooth surfaces that are affixed on mould 10, need to push down thin layer 30 with compacting tool 50 again.

As shown in Figure 6, because mould can be penetrated by ultraviolet light, therefore, can make ultraviolet light vertically inject from the bottom surface of mould 10 this moment, thereby the UV-cured resin 20 of slotted eye 11 inside can be sticked together and solidify on thin layer 30.Notice that because mould 10 has the impenetrable photoresist layer 15 of ultraviolet light, so overflow to the UV-cured resin on mould 10 surfaces will can not solidify, and still remain mobile liquid state.At last, thin layer 30 is separated with mould 10, and clean with solution.

With thin layer 30 and the finished product that is this thin button after mould 10 separates, Fig. 7 is finished figure of the present invention.As shown in the figure, thin layer 30 is a Keyboard pad, and a plurality of buttons 21 with the UV-cured resin moulding are arranged on it, respectively with the circuit board of electronic product on the corresponding setting of switch.

Because keyboard molding mode of the present invention is to inject UV-cured resin in the slotted eye 11 of mould 10, form button with the UV-cured resin after solidifying, therefore, the pattern of button and shape can be controlled by the shape of slotted eye 11, thereby these button peripheries can form chamfering or other sculpture style easily.

Fig. 8 and Fig. 9 are described for another example, and it is second embodiment of the present invention.Slotted eye 11a is that the cross section is semicircular pattern, so button 21a has circular arc.Similarly, Figure 10 and the 3rd embodiment shown in Figure 11 for another example, slotted eye 11b is that the cross section is corrugated pattern, therefore, button 21b also has corrugated surface.Therefore, the profile of the slim button of the present invention can be come change shape according to changing the pattern of mould 10 with slotted eye 11 arbitrarily, and is simply more a lot of than known injection moulding.

Claims

1. making method for thin key, described method comprises:

Preparation offers the mould that more than one slotted eye and ultraviolet light can penetrate;

On the upper surface beyond the described slotted eye of being positioned at of described mould photoresist layer is set, described photoresist layer is made of the impenetrable material of ultraviolet light;

In described slotted eye, inject UV-cured resin;

By exhaust mode thin layer closely is overlying on the described mould, to displace the gas between described thin layer and the described mould;

Ultraviolet light is injected from the bottom surface of described mould, thereby made described UV-cured resin solidify; And

Described thin layer and glutinous described UV-cured resin are thereon taken out from mould.

2. making method for thin key as claimed in claim 1 wherein, forms described photoresist layer by the impenetrable material of ultraviolet light is coated described die surface.

3. making method for thin key as claimed in claim 1 wherein, covers the surface that sheet material directly is attached at described mould by the ultraviolet light that will be formed with hollow out and form described photoresist layer, and described hollow out is corresponding with described slotted eye.

4. making method for thin key as claimed in claim 1, wherein, described thin layer is provided with the corresponding pattern of more than one and described slotted eye district, and described pattern district is formed at the pattern of the character on the keyboard of electronic product or numeral or symbol on the described thin layer by the mode of printing.

5. making method for thin key as claimed in claim 1, wherein, described thin layer is by positioner and described mold alignment.

6. making method for thin key as claimed in claim 5, wherein, described positioner is the location division of corresponding setting on described thin layer and described mould respectively.

7. making method for thin key as claimed in claim 5, wherein, the telltale mark of described positioner for being provided with on described mould detected described telltale mark by the inductor on the machine, described thin layer of described machine gripping and described mold alignment.

8. making method for thin key as claimed in claim 1, wherein, described thin layer needs clean with solution with after described UV-cured resin is separated again.

9. making method for thin key as claimed in claim 1, wherein, described UV-cured resin is hard after solidifying.

10. making method for thin key as claimed in claim 1, wherein, described UV-cured resin is soft after solidifying.