CN101673635B - Ultrathin mobile terminal key and processing method thereof - Google Patents
Ultrathin mobile terminal key and processing method thereof Download PDFInfo
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- CN101673635B CN101673635B CN 200910176392 CN200910176392A CN101673635B CN 101673635 B CN101673635 B CN 101673635B CN 200910176392 CN200910176392 CN 200910176392 CN 200910176392 A CN200910176392 A CN 200910176392A CN 101673635 B CN101673635 B CN 101673635B
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Abstract
The invention discloses a processing method for an ultrathin mobile terminal key. The method comprises the following steps: a steel-sheet frame and liquid silica gel are placed in a mould to be molded into a whole by heat pressing, wherein the steel-sheet frame is formed by punch forming of the selected thermal plastic elastomer film; and the integral member after heat-pressing molding is cut into keyboard single sheets by machining. The invention also discloses the ultrathin mobile terminal key of which the thickness is ultrathin to be 0.75mm generally; the characters and background colors are located on the backside of the thin films, thereby enabling paints not to be worn away; surface effects are rich, and effects such as highlight, matte, dermatoglyph and the like can be realized; the silicon gel part is supported and strengthened by the steel-sheet frame, thereby having good rigidity and ensuring the hand feeling of the key; and the key is molded by utilizing one process, namely heat-pressing molding, therefore, the assembly process is eliminated, production process is simplified, and the cost is low.
Description
Technical field
The present invention relates to the production and processing technology of mobile terminal key, relate in particular to a kind of ultrathin mobile terminal key and processing method thereof.
Background technology
Along with the portable terminal development of ultra-thinization day by day, require the mechanism's part in the portable terminal all to accomplish ultrathin design, comprise casing, button, eyeglass etc.Button is ten minutes important mechanism part on the portable terminal, not only directly has influence on the attractive in appearance of complete machine moulding, and its thickness has also determined complete machine thickness.General button all is made up of keycap and silica gel two parts.The keycap part is directly accepted user's use operation (pressure), and silicon gel part then deforms under pressure, makes the thin film switch on the mainboard contact conducting with pad, thereby realizes the function of button.
Button is different classification of material according to keycap and silicon gel part.The push-button type that existing ultrathin mobile terminal is used mainly comprise ultra-thin plastic cement (P, Plastic)+(R, Rubber) button, plastic board button and steel disc button are three kinds for rubber.Ultra-thin P+R button is that single keycap and the silicon gel part that the injection moulding stamp is good is bonded by glue, and the minimal thickness of keycap is because Shooting Technique is restricted to 0.5mm; Silicon gel part need adopt thermoplastic elastic body rubber (TPU, Thermo Plastic polyUrethanes) or PETG (PET, Polyethylene Terephthalate) film, with liquid-state silicon gel (Silicone) composite construction, this type button feel is good, and appearance effect is abundant, but thickness is because the keycap restriction is not less than 1.1mm, and the packaging technology complexity, the keytop out-of-flatness, cost is higher.
The keycap of plastic board button partly is through mach plastic board, plastic board comprises Merlon (PC, Polycarbonate) flat board and PET are dull and stereotyped two kinds, it is 0.4mm that keyboard hits life test requirement PC slab-thickness, the PET slab-thickness is 0.2～0.4mm, silicon gel part is identical with silicon gel part in the ultra-thin P+R button, and is bonding by double faced adhesive tape between dull and stereotyped keycap part and the silicon gel part.The keycap of the type button partly is a monoblock flat board, not exclusively disconnects between the keycap, and the button feel is general, and for guaranteeing machine work and requirement of strength, key arrangement decision key disc area can be bigger.The button effect is handled by the plastic board back side and is realized, technology comprises printing and vacuum plating etc., and appearance effect is more single.The plastic board cost is higher, and therefore whole button cost is higher.
The steel disc button has just partly changed keycap into copper sheet or stainless steel substrates through electroplating processes for the plastic board button, the keycap segment thickness is 0.2mm.This type button texture is good, but cost is very high, and radio frequency and static release (ESD, Electro-Static discharge) performance are had certain influence.
This shows, more than three types ultra-thin key all have certain limitation, need a kind of novel ultra thin handset button of exploitation.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of ultrathin mobile terminal key and processing method thereof, to realize a kind of production and processing of new type superthin mobile terminal key by simple process.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention provides a kind of processing method of ultrathin mobile terminal key, this method comprises:
With the thermoplastic elastomer (TPE) rubber film of choosing, stamping forming steel disc framework, and liquid-state silicon gel is placed in the mould by hot-forming and is one;
Described integral member after heat-pressing molding is cut into each keyboard monolithic by machine work;
Wherein, described hot-forming being specially:
Back up adhesive at described thermoplastic elastomer (TPE) rubber film is coated with the above liquid-state silicon gel then;
Described thermoplastic elastomer (TPE) rubber film is placed in the mold cavity of male model, and the back side of described thermoplastic elastomer (TPE) rubber film up, the steel disc framework is placed in the mold cavity of master mold, after male model and master mold are hot-forming, described liquid-state silicon gel is partially filled with steel disc framework hollow, and described thermoplastic elastomer (TPE) rubber film, liquid-state silicon gel and steel disc framework are shaped to one.
The described thermoplastic elastomer (TPE) rubber film of choosing is specially:
According to keyboard overall size and die size, determine the size of selected thermoplastic elastomer (TPE) rubber film, and calculate the keyboard finished product quantity of processing on the selected thermoplastic elastomer (TPE) rubber film;
Back up keypad character, background color and protection oil at selected thermoplastic elastomer (TPE) rubber film;
After the printing oven dry, stamp goes out location hole on described thermoplastic elastomer (TPE) rubber film.
This method further comprises: process specific surface effect at described male model mold cavity inner surface, after hot-forming, form corresponding effect at described thermoplastic elastomer (TPE) rubber film.
One-shot mould or the progressive die are adopted in the punch forming of described steel disc framework.
The processing method of a kind of ultrathin mobile terminal key provided by the present invention, with the thermoplastic elastomer (TPE) rubber film of choosing, stamping forming steel disc framework, and liquid-state silicon gel is placed in the mould by hot-forming and is one; Integral member after heat-pressing molding is cut into each keyboard monolithic by machine work.A kind of ultrathin mobile terminal key provided by the present invention, its thickness is ultra-thin, generally can be as thin as 0.75mm; Character and background color are positioned at the thermoplastic elastomer (TPE) rubber film back side, can not wear away lacquer; Surface effect is abundant, can realize various effects such as Gao Guang, cloudy surface, dermatoglyph; Silicon gel part has steel disc frame supported and reinforcement, good rigidly, and the button feel is guaranteed; Button adopts a procedure moulding (hot-forming), removes assembly process from, and production technology is simple, and cost is low.
Description of drawings
Fig. 1 is the flow chart of the processing method of a kind of ultrathin mobile terminal key of the present invention;
Fig. 2 is the thermoplastic elastomer (TPE) rubber film schematic diagram of a kind of ultrathin mobile terminal key of the present invention;
Fig. 3 is the steel disc framework schematic diagram of a kind of ultrathin mobile terminal key of the present invention;
Fig. 4 is the shaping schematic view of a kind of ultrathin mobile terminal key of the present invention;
Fig. 5 is the planar structure schematic diagram of a kind of ultrathin mobile terminal key of the present invention;
Fig. 6 is the cross-sectional view of a kind of ultrathin mobile terminal key of the present invention.
Embodiment
The technical solution of the present invention is further elaborated below in conjunction with the drawings and specific embodiments.
The processing method of a kind of ultrathin mobile terminal key provided by the present invention as shown in Figure 1, mainly may further comprise the steps:
Choosing with work flow of thermoplastic elastomer (TPE) rubber film is specially: according to keyboard overall size and die size, determine the size of selected thermoplastic elastomer (TPE) rubber film, and calculate machinable keyboard finished product quantity on the selected thermoplastic elastomer (TPE) rubber film; Back up keypad character, background color and protection oil at selected thermoplastic elastomer (TPE) rubber film; After the printing oven dry, punch forming goes out location hole on the thermoplastic elastomer (TPE) rubber film.
The thermoplastic elastomer (TPE) rubber film thickness specification of choosing in the practical application can be 0.15mm or 0.2mm or 0.25mm.After choosing the thermoplastic elastomer (TPE) rubber film, its back side need namely be printed keypad character, background color and protection oil respectively through at least three road typographies.After the printing oven dry, need on the thermoplastic elastomer (TPE) rubber film, go out location hole by suitable position stamp, this location hole is used for the location of thermoplastic elastomer (TPE) rubber film in mold cavity.
The schematic diagram of thermoplastic elastomer (TPE) rubber film among the present invention, as shown in Figure 2, machinable keyboard finished product quantity is 4 on this thermoplastic elastomer (TPE) rubber film; Keypad character among the figure, background color all are that the back up at the thermoplastic elastomer (TPE) rubber film gets on, and can not have directly with the user to contact, and therefore can not wear away lacquer; Circle among the figure is represented the location hole that punch forming obtains.It is pointed out that in actual applications machinable keyboard finished product quantity is not limited only to 4 shown in Fig. 2 on the thermoplastic elastomer (TPE) rubber film, for example, also can be 12 or 24 etc., make that like this processing is more efficient.
In actual applications, can select the stainless steel substrates of 0.1mm thickness specification, after punch forming, obtain the steel disc framework.The schematic diagram of steel disc framework among the present invention, as shown in Figure 3, part shown in the matrix square frame among the figure, the trapezoidal frame all is empty after the process punch forming, this part can be filled by liquid-state silicon gel in the molded process of subsequent thermal; Circle among the figure is represented the location hole that punch forming obtains, and this location hole is used for the location of steel disc framework in mold cavity.Part among Fig. 3 except matrix square frame, trapezoidal frame, circle all is stainless steel.
The structure of steel disc framework shown in Figure 3 is corresponding with the structure of thermoplastic elastomer (TPE) rubber film shown in Figure 2, and because the steel disc frame structure is simple relatively, therefore, its punch forming is fit to select for use the one-shot mould.Certainly, steel disc of the present invention also can adopt progressive die punch forming.
Concrete hot-forming being operating as: at first, at the back up adhesive of thermoplastic elastomer (TPE) rubber film, be coated with the liquid-state silicon gel of spreading a suitable size (size obtains by statistical computation) then; Then, the thermoplastic elastomer (TPE) rubber film is placed in male model (also the claiming punch) mold cavity, the steel disc framework is placed in master mold (also the claiming die) mold cavity, by hot-forming be one.
Hot-forming schematic diagram as shown in Figure 4, is used for hot-forming mould and is made up of male model 11 and master mold 12, has protruding 16(also to claim to cut apart the muscle position on the male model 11); Projection 16 effect is to make to form corresponding groove at the thermoplastic elastomer (TPE) rubber film after hot-forming, and this groove is in order to be divided into each keycap with whole thermoplastic elastomer (TPE) rubber film, and the degree of depth of practical application further groove can be 0.1mm; Thermoplastic elastomer (TPE) rubber film 13 is placed in the mold cavity of male model 11, and the back side of thermoplastic elastomer (TPE) rubber film 13 up, the liquid-state silicon gel 15 that the rectangular i.e. expression of the black on the thermoplastic elastomer (TPE) rubber film 13 is smeared; Steel disc framework 14 is placed in the mold cavity of master mold 12.Thus, after male model 11 and master mold 12 are hot-forming, liquid-state silicon gel 15 is about to the partially filled of steel disc framework 14 hollows, and forms groove at thermoplastic elastomer (TPE) rubber film 13, and thermoplastic elastomer (TPE) rubber film 13, liquid-state silicon gel 15, steel disc framework 14 are shaped to one.
In addition, as a kind of preferred embodiment of the present invention, can process specific surface effect (as: Gao Guang, cloudy surface, dermatoglyph etc.) at the mold cavity inner surface of male model 11, after hot-forming, can form corresponding effect (as: Gao Guang, cloudy surface, dermatoglyph etc.) at the thermoplastic elastomer (TPE) rubber film.
Thermoplastic elastomer (TPE) rubber film corresponding shown in Figure 2 after cutting by machine work so, can once obtain 4 keyboard monolithics as shown in Figure 5.Accordingly, if machinable keyboard finished product is more on the thermoplastic elastomer (TPE) rubber film (for example: 12 or 24), after cutting by machine work so, can once obtain more keyboard monolithics as shown in Figure 5.
In the keyboard monolithic that obtains through above-mentioned processing method shown in Figure 1, the thermoplastic elastomer (TPE) rubber film namely constitutes the keycap part of button, and each keycap separated by groove, and steel disc framework and liquid-state silicon gel namely constitute the silicon gel part of button.The thickness of whole keyboard is 0.75mm.Below in conjunction with the sectional structure chart of button shown in Figure 6, the operation principle of button is described.
As can be seen from Figure 6, there is groove on the thermoplastic elastomer (TPE) rubber film 13, groove is partitioned into each keycap at thermoplastic elastomer (TPE) rubber film 13, be bonded with steel disc 17 and liquid-state silicon gel 15 at the back side of thermoplastic elastomer (TPE) rubber film 13, and liquid-state silicon gel 15 wraps up steel disc 17.When the user pressed keycap on the thermoplastic elastomer (TPE) rubber film 13, pressure was passed to liquid-state silicon gel 15 and steel disc 17, caused liquid-state silicon gel 15 distortion, and steel disc 17 is extruding direct liquid-state silicon gel 15 parts (being called elastic wall 18) of contact below it further; Liquid-state silicon gel 15 transmits pressure downwards, and by the part of contact 19(liquid-state silicon gel 15 to lower convexity) pressure make the thin film switch on the mainboard contact conducting with pad, thereby realize the function of button.When the user stopped to press keycap on the thermoplastic elastomer (TPE) rubber film 13, liquid-state silicon gel 15 resiled, and extruding steel disc 17 and thermoplastic elastomer (TPE) rubber film 13, and keycap is upspring.
In sum, ultrathin mobile terminal key provided by the present invention, its thickness is ultra-thin, generally can be as thin as 0.75mm; Character and background color are positioned at the thermoplastic elastomer (TPE) rubber film back side, can not wear away lacquer; Surface effect is abundant, can realize various effects such as Gao Guang, cloudy surface, dermatoglyph; Silicon gel part has steel disc frame supported and reinforcement, good rigidly, and the button feel is guaranteed; Button adopts a procedure moulding (hot-forming), removes assembly process from, and production technology is simple, and cost is low.
The above is preferred embodiment of the present invention only, is not for limiting protection scope of the present invention.
Claims (4)
1. the processing method of a ultrathin mobile terminal key is characterized in that, this method comprises:
With the thermoplastic elastomer (TPE) rubber film of choosing, stamping forming steel disc framework, and liquid-state silicon gel is placed in the mould by hot-forming and is one;
Described integral member after heat-pressing molding is cut into each keyboard monolithic by machine work;
Wherein, described hot-forming being specially:
Back up adhesive at described thermoplastic elastomer (TPE) rubber film is coated with the above liquid-state silicon gel then;
Described thermoplastic elastomer (TPE) rubber film is placed in the mold cavity of male model, and the back side of described thermoplastic elastomer (TPE) rubber film up, the steel disc framework is placed in the mold cavity of master mold, after male model and master mold are hot-forming, described liquid-state silicon gel is partially filled with steel disc framework hollow, and described thermoplastic elastomer (TPE) rubber film, liquid-state silicon gel and steel disc framework are shaped to one.
2. according to the processing method of the described ultrathin mobile terminal key of claim 1, it is characterized in that the described thermoplastic elastomer (TPE) rubber film of choosing is specially:
According to keyboard overall size and die size, determine the size of selected thermoplastic elastomer (TPE) rubber film, and calculate the keyboard finished product quantity of processing on the selected thermoplastic elastomer (TPE) rubber film;
Back up keypad character, background color and protection oil at selected thermoplastic elastomer (TPE) rubber film;
After the printing oven dry, stamp goes out location hole on described thermoplastic elastomer (TPE) rubber film.
3. according to the processing method of the described ultrathin mobile terminal key of claim 1, it is characterized in that, this method further comprises: process specific surface effect at described male model mold cavity inner surface, after hot-forming, form corresponding effect at described thermoplastic elastomer (TPE) rubber film.
4. according to the processing method of the described ultrathin mobile terminal key of claim 1, it is characterized in that one-shot mould or the progressive die are adopted in the punch forming of described steel disc framework.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910176392 CN101673635B (en) | 2009-09-29 | 2009-09-29 | Ultrathin mobile terminal key and processing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910176392 CN101673635B (en) | 2009-09-29 | 2009-09-29 | Ultrathin mobile terminal key and processing method thereof |
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| CN101673635A CN101673635A (en) | 2010-03-17 |
| CN101673635B true CN101673635B (en) | 2013-07-03 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101958201A (en) * | 2010-06-07 | 2011-01-26 | 昆山鼎硕电子科技有限公司 | Silica gel module difficult to tear |
| CN102386011B (en) * | 2010-08-27 | 2015-03-04 | 比亚迪股份有限公司 | Mobile phone key and processing method thereof |
| CN102456486A (en) * | 2010-10-14 | 2012-05-16 | 南通万德科技有限公司 | Shell panel compositely molded with keyboard |
| CN104580574A (en) * | 2013-10-29 | 2015-04-29 | 比亚迪股份有限公司 | Manufacture method of mobile phone front casing, mobile phone front casing and mobile phone |
| CN104465171B (en) * | 2014-12-10 | 2016-09-07 | 深圳市东强精密塑胶电子有限公司 | A kind of ultrathin touch-switch manufacture method |
| CN106412190B (en) * | 2016-10-14 | 2022-09-09 | 西安易朴通讯技术有限公司 | Terminal |
| CN111063567A (en) * | 2019-12-11 | 2020-04-24 | 珠海创田印刷有限公司 | Application of TPU material in panel key |
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| KR100787382B1 (en) * | 2006-03-21 | 2007-12-24 | 주식회사 쎈스테크 | A sheet-type key-pad assembly |
| KR100772763B1 (en) * | 2006-06-29 | 2007-11-01 | 신익규 | Forming method for keypad surface pattern |
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Granted publication date: 20130703 Termination date: 20200929 |