CN101091230A - Thin key sheet and thin key unit incorporating the thin key sheet - Google Patents
Thin key sheet and thin key unit incorporating the thin key sheet Download PDFInfo
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- CN101091230A CN101091230A CN 200580044970 CN200580044970A CN101091230A CN 101091230 A CN101091230 A CN 101091230A CN 200580044970 CN200580044970 CN 200580044970 CN 200580044970 A CN200580044970 A CN 200580044970A CN 101091230 A CN101091230 A CN 101091230A
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Abstract
In order to meet a requirement by a portable phone's tendency toward thinning due to its need of placing importance on design, a key sheet portion must be thinned as much as possible. A thin key sheet comprising a metal- or resin-made key top (2) formed on the front or rear surface thereof with displays such as characters, symbols and diagrams that indicate key functions, and a printed circuit board (5) provided on the front surface thereof with a switching element (4) for turning on/off an electric circuit by pressing onto the key top and formed with circuit patterns needed by this element, wherein a cushioning gasket (3) and a filling material layer (14) having proper elasticity and disposed between the key top and the printed circuit board are used to bond and fix the key top (2) and the printed circuit board (5) together; and a thin key unit incorporating this thin key sheet.
Description
Technical field
The present invention relates to be used for pair set dispose as mobile phone, carry information terminal device (PDA) etc. portable, input medium that mobile apparatus is used a plurality of buttons button piece and assembled the technology that the push-button unit of this button piece carries out slimming.
Background technology
Button piece is the member that constitutes mobile phone, carries information terminal device portable mobile apparatus such as (PDA),, arrange to be bonded on a slice plate face that is called as Keyboard pad (key pad) and form as a plurality of keys tops (key top) of buttons such as letter and/or numerical key, function key respectively.Above-mentioned Keyboard pad is the flexible sheets that silicone rubber or thermoplastic elastomer etc. have caoutchouc elasticity.The button piece of Gou Chenging in this way is close to below it and is disposed tellite, and this tellite possesses a plurality of normal opened contacts closed by pressing button, forms push-button switch, and disposes and be used for the light source that button thrown light on from the inside.
Like this, button piece is made of with the state that is overlapped into stratiform a plurality of inscapes, so the one-tenth-value thickness 1/10 that each inscape is accumulated is very big.Therefore in order further to improve the portability of portable mobile apparatus, require as far as possible with whole slimming.
, for example in patent documentation 1 disclosed method, because each overlapping inscape has existing common-sense structure, so there is the limit in constructional further slimming.In addition, only use the EL sheet thinner, there is the limit in the slimming of button piece than LED for light source.
Patent documentation 1: TOHKEMY 2002-234757 communique
Mobile phone is because pay attention to design, so the slimming tendency is arranged.So, require its thickness to be as thin as about 1.0mm for button piece.As long as but the prior art of continuing to use, just there is the limit in the slimming of button piece.This limit is 1.5～1.6mm.
Though be used for from the inside the light source of key jacking row illumination for a short time, as little beans, be stereoisomer with length size, especially it has highly hindered slimming.
The key top is under the resinous situation, and in order to obtain necessary strength, the limit of slimming is 0.6mm.In addition, do under the situation of light source, be necessary on Keyboard pad, to prepare the LED accommodation section with LED (light-emitting diode).The minimum thickness that also needs 0.6mm in this accommodation section in order to ensure key stroke, also needs to reserve the operating member of 0.3mm.So the thickness that can not make Keyboard pad is below the 0.9mm.
Summary of the invention
At such present situation, the problem that the present invention will solve is: in order further to improve portability portable, mobile apparatus, with the slimming as much as possible of its thickness, reduce the overlapping number of each independent inscape of push-button unit part; Restriction hinders one of reason of slimming and promptly is used for from the inside height to the light source of key jacking row illumination, improves life water proofing property and dust tightness simultaneously.
As one of means that solve above-mentioned problem, utilization has suitable flexible buffering liner, the use of the Keyboard pad that replacement is formed by silicone rubber or thermoplastic elastomer, push up for key, when it is resin system, controlling its thickness limit is 0.6mm, and when being SUS metallic plate systems such as (stainless steels) on the key top in addition, controlling its thickness limit is 0.1～0.3mm.Under the situation on metal key top,, also can adopt laser-induced thermal etching method or chemical method for etching that literal etc. is bored a hole for being illuminated.But, under the situation of perforation like this, be necessary to make these holes to have water proofing property and dust tightness, and when bore edges is operated, can not hurt finger.Simultaneously, expectation integral body can have the life water proofing property.
And, be conceived to hinder being used for from the inside of slimming to the light source of key jacking row illumination.So, as the mechanism that is used to limit the light source height, replace existing three-dimensional light sources such as LED, by utilizing EL (Electro-luminescence) element of the film like that thickness (highly) reduces significantly, and the EL element of this film like is formed at the back side on key top by printing, form the integrated thin button sheet structure of EL.And, by the film build method of metallic films such as evaporation or sputter, make the distribution of slim EL light source on Keyboard pad or key top, form conductive pattern, can further realize slimming.
The invention effect
1) use prior art, the thickness limit of push-button unit is 1.5mm～1.6mm, but can break through this boundary by implementing the present invention, realizes the slimming that 1.0mm is following.
2) and, use has suitable flexible buffering liner substituting for key pad, an overlapping layer (be used for be fixed on the key top adhesive phase on the Keyboard pad etc.) has been reduced in retainingf key top when supporting the key top to move up and down thus therefore, has further realized slimming.
3) by configuration foamed material or soft material below the key top, when improving the button feel, realized slimming.
4) simultaneously, along with mobile phone in recent years, carry information terminal device portable mobile apparatus such as (PDA) and progress into daily life, the expectation that can the person of satisfying the demands life water-proof function be improved.
Description of drawings
Fig. 1 is that expression possesses overall perspective view thin button sheet of the present invention, folding slimming mobile phone;
Fig. 2 is the stereogram of outward appearance of the embodiment 1 of expression thin button sheet of the present invention;
Fig. 3 is the exploded perspective view of the embodiment 1 of thin button sheet of the present invention;
Fig. 4 is among the embodiment 1 of expression thin button sheet of the present invention, and the specific part at the back side, key top uses the sectional view of the bonding buffering of distributor with the summary of the operation of liner;
Fig. 5 is among the embodiment 1 of expression thin button sheet of the present invention, and a plurality of specific parts at the back side, key top are attached with the stereogram of buffering with the state of liner;
Fig. 6 is the amplification sectional view of embodiment 1 structure of expression thin button sheet of the present invention;
Fig. 7 is the amplification stereogram of embodiment 2 outward appearances of expression thin button sheet of the present invention;
Fig. 8 is the amplification sectional view of embodiment 2 structures of expression thin button sheet of the present invention;
Fig. 9 is the amplification stereogram of embodiment 3 outward appearances of expression thin button sheet of the present invention;
Figure 10 is the amplification sectional view of embodiment 4 structures of expression thin button sheet of the present invention;
Figure 11 is the amplification sectional view of the embodiment 4 variation structure of expression thin button sheet of the present invention;
Figure 12 is the amplification sectional view of embodiment 5 structures of expression thin button sheet of the present invention;
Figure 13 is the amplification sectional view of the embodiment 5 variation structure of expression thin button sheet of the present invention;
Figure 14 is the amplification sectional view that other variation of the embodiment 5 of expression thin button sheet of the present invention is constructed;
Figure 15 be expression thin button sheet of the present invention embodiment 6 filling the amplification sectional view of the structure behind foamed material or the soft material;
Figure 16 be expression thin button sheet of the present invention embodiment 7 filling the amplification sectional view of foamed material or soft material structure;
Figure 17 be expression thin button sheet of the present invention embodiment 8 filling the amplification sectional view of foamed material or soft material structure;
Figure 18 be expression thin button sheet of the present invention embodiment 9 variation filling the amplification sectional view of foamed material or soft material structure;
Figure 19 be expression thin button sheet of the present invention embodiment 10 filling the amplification sectional view of foamed material or soft material structure;
Figure 20 is the amplification sectional view that the variation (do not have liner, filled foamed material or soft material) of the embodiment 10 of expression thin button sheet of the present invention is constructed;
Figure 21 is other the amplification sectional view of variation (do not have pad, filled foamed material or soft material) structure of the embodiment 10 of expression thin button sheet of the present invention.
Embodiment
Can realize the slimming of button piece by following execution mode: by between key top and tellite, disposing pad (buffering is with liner or suitable foam material or soft material or use these materials simultaneously), and no longer need the execution mode of the slim structure of Keyboard pad; Make the key top constitute the execution mode of a slice; Utilize the one-tenth embrane method of metallic films such as evaporation or sputter to form the execution mode of slim EL light source distribution.
In addition, by at the back side on above-mentioned key top and be disposed between the tellite below it, sandwich as soft materials such as the foamed material such as urethane foam of material or various soft elastomers, when improving the button feel, also can reach slimming with disturbing property and recovery of shape.Embodiment 1 in the back will be elaborated to it.And, as light source, be attached in use under the situation of the EL sheet (being configured to the EL light source of specific pattern on the resin film) of (specifically being arranged on the metal dome on the tellite) between key top and the circuit pattern, described foamed material and soft material are necessary it is transparent.
The form of mobile phone roughly can be divided into two kinds: picture display part divides and the key top portion is configured at grade, all is the mobile phone of clavate (board-type); And dispose hinge (cardinal) between picture display part branch and the key top portion, the Foldable mobile phone that can fold, but because the button piece slimming of object of the present invention is applicable to any type, so the suitable example that is applicable to Foldable mobile phone (with reference to Fig. 1) is shown as an embodiment.
As Fig. 2, Fig. 7 and shown in Figure 9, the thin button sheet (below, abbreviate " button piece " as) 1,1A and 1B comprise: make a plurality of buttons set and form one (Fig. 2 and Fig. 9) or form key top 2 (the perhaps key top 2a～2d) of (Fig. 7) respectively separately, described a plurality of button is the ten key 2a that represent letter, mark and/or numeral respectively, have respectively power supply unlatching, close, the function key 2b of functions such as the cut-out of electric wire, mail and the buttons such as cursor key 2c of center upper portion part; And buffering is with liner (being designated hereinafter simply as " liner ") 3, and it replaces the sheet of the existing softness that is made of various rubber such as silicone rubber or thermoplastic elastomers is the Keyboard pad use.
Below the button piece 1 that constitutes in this way, as the switch key element, compact configuration tellite 5, this tellite 5 possesses by pressing button the closed metal dome 4 (metal dome) that a plurality of normal opened contact short circuits are electrically connected etc. that makes, and the EL element of using as light source 6 to key jacking row illumination is configured between key top 2 and the tellite 5 being used for from the inside, the push-button unit that has constituted as illuminated push-button switch integrated module change.
In addition, though it is optional, but 2 the back side preferably on key top, as the projection of pushing above-mentioned metal dome 4 usefulness, on EL element 6 (with reference to Fig. 6, Figure 10 to Figure 14), the method by supplying with suitable aqueous hard resin by distributor 10 (with reference to Fig. 4) or form contact push projection (pressing piece) 7 (with reference to Fig. 6, Fig. 8, Figure 10 to Figure 14) for example by silk screen printing etc.
Above-mentioned tellite 5, the Wiring pattern 5a at the table back side connects (with reference to Fig. 6, Fig. 8, Figure 10 to Figure 14) by through hole 5b.This through hole 5b also can cover (with reference to Figure 10) with conducting rubber or conductivity China ink 5c in order to ensure the Wiring pattern 5a that connects the table back side.Enumerate the explanation specific embodiments of the invention below.
Fig. 1～Fig. 6 represents the embodiment 1 of thin button sheet of the present invention.The push-button unit of present embodiment as Fig. 2, Fig. 3 and shown in Figure 6, is formed the key that the metal sheets such as SUS of one form and pushes up 2 by set various button 2a, 2b and 2c; Constitute button pieces 1 with the liner 3 along the configuration of the periphery of each button, its downside compact configuration has the tellite 5 that forms by ester moulding.
When the chain-dotted line 8 of horizontal expansion among Fig. 6 was illustrated in key top 2 and is pressed, the bottom on key top 2 overcame the elasticity of liner (gasket) 3 and metal dome 4 and the position that is depressed.When key top 2 was depressed into the position of this chain-dotted line 8, by pushed up pushing by giving as security part 7 of 2 back sides by key, metal dome 4 made short circuit between two normal opened contacts (omitting diagram) that are configured on the tellite 5.Thus, only during pressing key top 2, finish circuit.And 9 is pad (spacer), supports key top 2 at outer part.
As Fig. 1 to Fig. 3 and shown in Figure 6, key top 2 becomes illuminated for the letter that makes the function of representing each button 2a, 2b and 2c respectively, mark and/or numeral etc., penetrate into the back side from the surface of the metallic plate that constitutes key top 2, be provided with the through hole 2d of the shape that is matched with letter, mark and/or numeral etc.These through holes 2d shown in the local expanded view of Fig. 6, for waterproof and dustproof, is covered by suitable transparent resin 2f.In addition, key top 2 is provided with groove 2e, with the regional corresponding of each button 2a, 2b and 2c and can distinguish these zones.
This groove 2e as shown in Figure 6, extends through the back side from the surface of the metallic plate that constitutes key top 2.Thus, each button 2a, 2b and 2c become the state that has only an end parts to link to each other with other, and continuous part roughly has hinge function, and each button 2a, 2b and 2c are moved up and down when pushing easily.In each groove 2e,, covered (with reference to Fig. 6) in addition by an appropriate resin 2f who only adheres in a part for waterproof reaches the action of preventing dust and not hindering each button 2a, 2b and 2c.
With respect to each button 2a, the 2b on key top 2 and the back side of 2c,, be formed with EL (Electro-luminescence) element 6 by printing as the transmission illumination light source.
On the back side on key top 2 and the surface of tellite 5, corresponding with the position of each button 2a, 2b and 2c, utilize distributor 10 or silk screen printing (thickness is when 0.3mm is following) etc. to form the liner 3 (with reference to Fig. 4 and Fig. 5) of desired pattern with wire or point-like.Across this liner 3, the key top direct fixed configurations of 2 quilts is on tellite 5.Owing to adopt this structure, just do not need existing Keyboard pad, the situation than using Keyboard pad can further realize slimming.
As the material of liner 3, except above-mentioned character, be the condition that possesses the material of adhesiveness and rubber-like elasticity as long as satisfy, can suitably select any material for use.Such as, can use various foamed resins, silicone-based or urethane acrylates such as polyurethane resin foam is resin etc.In addition, also can use " the liner constituent " of record in the invention (liner is with constituent and the liner manufacture method of using this constituent: No. 235841, international publication number WO96/10594/ Korean Patent, No. 95195961, Chinese patent, No. 39208, Singapore's patent, No. 5945463, United States Patent (USP), the flat 8-511615 of Japanese patent application number) of the applicant and other applicant's co-applications etc., enumerate this example here.
The sectional view of Fig. 4 is represented: with each button 2a, 2b and the corresponding specific part of 2c on the key on tellite 5 surfaces top 2, the job state of the material by distributor 10 liner attachment 3.Fig. 4 (a) expression is matched with the profile of each key area that is illustrated by the broken lines, within it the state that adheres to wire of side; Fig. 4 (b) expression is matched with each key area, is the state that point-like is adhered to suitable interval.In addition, each stereogram of Fig. 5 (a) and Fig. 5 (b) is represented: the key that has overturn along the table back side pushes up the object line of each button 2a, the 2b etc. at 2 back sides, within it the job state during side liner attachment 3 materials.
As shown in Figure 6, liner 3 pushes up under the state at 2 back sides being attached to key, keeps projection state to a certain extent, can not make the shape collapse because of flowing, and solidifies when keeping shape, keeps the resiliency of regulation.And, shown in Fig. 4 (a) and Fig. 5 (a), when liner 3 adheres to wire, its part is removed and suitable space is set, discharge portion in the time of can also be as pressing keys, under the situation that such space is not set, can be the through hole of tellite 5 as same discharge portion.
The distribution mechanism that uses to each EL element 6 supply illuminating powers is not specially limited.For example, as shown in Figure 6, also can adopt such structure: the suitable position of the printed wiring 5a on tellite 5, by conductive rubber etc. contact projection 11 is set, the contact of the upper end of this contact projection 11 and EL element 6 sides keeps in touch always.
The thin button sheet 1 of the foregoing description 1 expression, can be that the metallic plate of 0.2mm is as key top 2 with thickness, with thickness be that 0.2 to 0.3mm metal dome 4 is combined, can with on them, add thickness after the thickness of contact push projection 7, promptly, from key push up 2 surfaces to the THICKNESS CONTROL on tellite 5 surfaces about 0.65mm.
And the key top 2 of button piece 1 and button piece 1B described later is because be to utilize the elasticity of metallic plate to push the structure of metal dome, so preferably thinner to a certain extent.If thin excessively, when key top 2 is applied some stress, deform and can not turn back to original shape, therefore, be preferably about 0.2mm on present situation.But,, also can form the thickness of 0.1mm so long as can eliminate the material that causes this problem of distortion by stress.
Fig. 7 and Fig. 8 represent the embodiment 2 of thin button sheet of the present invention.The relevant thin button sheet 1A of embodiment 2 therewith, as shown in Figure 7, comprise the ten key 2a that represent letter, mark and/or numeral respectively, have power supply unlatching, close, a plurality of buttons of the buttons such as cursor key 2c of the function key 2b of functions such as the cut-out of electric wire, mail and center upper portion part are as a plurality of keys top 2 independent respectively formation.
The structure on key top 2 is that each button 2a, 2b and 2c are independent individuals, independent respectively can moving up and down.In addition, though structure not necessarily is fixed on button frame 13 on the tellite 5 across pad 9 between being provided with in the mode around the peripheral part on key top 2.Button piece 1A is except said structure, and the structure with button piece 1 is identical basically, therefore about this identical component part, and the identical mark that uses when using, omission explanation with explanation button piece 1.
Fig. 9 represents the embodiment 3 of thin button sheet of the present invention.The thin button sheet 1B's that embodiment 3 is relevant is configured to therewith, there is not the key of button piece 1 among the described embodiment of being arranged at 1 to push up on 2, with the regional corresponding of each button 2a, 2b and 2c and distinguish these regional groove 2e, only the elasticity of the metallic plate by constituting key top 2 just can be pushed the structure moving up and down of metal dome.
Thereby, distortion when occurring in stress application and irreplaceable problem for the key top 2 of the key top 2 that do not make button piece 1B and described button piece 1 is the same, the key of button piece 1B pushes up 2 thickness and is set to 0.2mm.Button piece 1B is except said structure, and the structure with button piece 1 is identical basically.About this identical structure division, identical mark when using, omission explanation with explanation button piece 1.
Figure 10 and Figure 11 are the embodiment 4 of expression thin button sheet of the present invention and the figure of variation thereof.The relevant thin button sheet 1C of embodiment 4 therewith, has the basic structure roughly the same with the button piece 1A of embodiment 2, have the ten key 2a that comprise expression letter, mark and/or numeral, have power supply unlatching, close, a plurality of buttons of the buttons such as cursor key 2c of the function key 2b of functions such as the cut-out of electric wire, mail and center upper portion part are as the 2 independent respectively keys tops 2 that form, a plurality of keys top.Each key top 2 is formed by transparent hard resins such as polycarbonate resin, acrylic acid hard resins.
Follow in this, be formed with the text printout layer 12 of positive (positive) or negative film (negative) shape at the back side on each key top 2, EL element 6 forms in the mode that covers this literal printed layers 12.The light that utilization is sent from this EL element 6 illuminates the various literal of the expression keypress function that is formed at text printout layer 12 etc.The table back side of the Wiring pattern 5a of tellite 5 connects by the through hole 5b by conducting rubber or conductivity China ink 5c landfill.That Figure 11 represents is the variation 1D of button piece 1C, as this button piece 1D, also can form the through hole 5b of the opening of the structure of simplifying the Wiring pattern 5a that connects the table back side in tellite 5.
The button piece 1C of this embodiment 5 and the outward appearance of 1D, roughly the same with button piece 1A shown in Figure 7. Button piece 1C and 1D are except said structure, and the structure with button piece 1 and 1A etc. is identical basically.About this identical structure division, identical mark when using, omission explanation with explanation button piece 1.And 2 is under the resinous situation on key top, also can not form text printout layer 12 overleaf, (is exposed to outside upper surface and side) on its surface by covering with paint, lacquer, colour wash, etc. to wait and applies suitable decoration, the tone of formation outward appearance or literal etc.
Figure 12 to Figure 14 represents embodiment 5 and two variation of thin button sheet of the present invention.Relevant thin button sheet 1E and variation 1F and the 1G of embodiment 5 therewith, identical with the various embodiments described above, have the ten key 2a that comprise expression letter, mark and/or numeral, have power supply unlatching, close, a plurality of buttons of the buttons such as cursor key 2c of the function key 2b of functions such as the cut-out of electric wire, mail and center upper portion part form the key top 2 (or metallic or resinous independently key top 2) of the integrated metallic of one.The back side on each key top 2 of button piece 1E shown in Figure 12 is formed with the text printout layer 12 of positive or negative sheet.On Figure 13 and button piece 1F, the 1G shown in Figure 14, be provided with the through hole 2d that forms shapes such as literal.
In these button pieces 1E, 1F and 1G, EL element 6 is not to be formed at the back side on each key top 2 by printing, but is configured to be formed at by printing the surface and the metal dome 4 of the sheet button piece covering tellite 5 on the resinous film.The outward appearance of button piece 1E, 1F and 1G, roughly the same with Fig. 7 and button piece 1A or 1B shown in Figure 9 respectively.Button piece 1D, 1E and 1F are except said structure, and the structure structure with button piece 1 and 1A etc. basically is identical.About this identical structure division, identical mark when using, omission explanation with explanation button piece 1.
As mentioned above, the key of thin button sheet of the present invention top is made of metallic plates such as resin or SUS.Thus, the thickness limit on key top 2 is that the situation of resin is that (integral body: 1.05mm), the situation of SUS is (0.1～0.3mm/ integral body: 0.75mm or 0.65mm) about 0.2mm to 0.6mm, and can make the thickness from the key top surface to substrate surface is 0.6～1.1mm.
The EL element of using as the light source of the literal that is used to illuminate each button 2a, 2b of expression and 2c function etc. 6 is carried out distribution to described EL element 6 by form copper wiring pattern on tellite 5, constitutes the integrated thin button sheet of EL.On key top 2 is under the metal situation, illuminated in order to form, and also can form the through hole of literal shape by etching method or suitable method.
On key top is under the situation of metal, can all key tops is integrated, constitute the airtight construction that clips by key top and circuit substrate (with reference to Fig. 2, Fig. 9).Metallic plate is not limited only to SUS, so long as there is suitable flexible metal just passable.
Preferably, constitute the button piece module that is assembled as one, constitute the thin button sheet in this way as push-button unit with tellite (PCB) 5 grades.
Below key top 2 and clip metal dome 4 between the tellite 5.Metal dome 4 is to be made by the material that has conductivity and have for example phosphor bronze and so on of shape memory, and is dome-shaped because of having, so gain the name.It is dome-shaped that metal dome 4 not necessarily must form this kind, as long as its shape and structure can meet the following conditions: pushed up 2 o'clock pressing key, the reliable closed normal opened contact of energy, and pushed up 2 o'clock stopping to press key, shape can return to original state.The effect of metal dome 4 is, when specific key top 2 is pressed, in response to the motion of pressing of metal dome element, closed configuration thereunder be printed the normal opened contact of distribution on tellite 5, form circuit.
2 upper surface or lower surface uses various trailings arbitrarily on key top, and enforcement comprises the decoration of the literal of representing each keypress function, mark etc.Even button is under the metal situation,, can carry out various coverings with paint to its surface if button piece is not applied simply the outward appearance of metal tone.
As mentioned above, after having disposed metal dome 4 on the surface of tellite 5, in order to fix each metal dome 4 it is not offset from the position, the surface coverage of tellite 5 has sheet (for example, thin slice such as pet film) as thin as a wafer.In Fig. 6, illustrate that cover on the hole of through hole 5b is exactly this thin slice 5d.Can be understood as and cover too on the metal dome 4.
Below with reference to Figure 15, the embodiment 6 that is provided with encapsulant layer 14 is described.In embodiment 1～5, shown in the enlarged cross section figure of Fig. 6 and Fig. 8, make the liner 3 of described buffering usefulness extend (with reference to Fig. 5) with " continuous river levee " shape at the upper surface of tellite 5 (along the periphery inboard at the back side on each key top 2).Thus, between above-mentioned key top 2 and configuration tellite 5 thereunder, produced the encirclement space.Because contact projection 11 exists with point format, surround the space so do not produce.This encirclement space is centered on by following key element and constitutes: liner 3; Push up the film like EL light source component 6 of 2 lower surfaces attached to key; Cover the described sheet 5d as thin as a wafer of the upper surface of tellite 5 with metal dome 4.
Filled and process material or soft material in this surrounds the space.Encapsulant layer 14 after Figure 15 represents to fill.Because the foamed material or the soft material that use are necessary to have the property of disturbing and recovery of shape, so the foamed material of preference such as silicone-based or urethane acrylate system or various soft elastomers etc.If concrete expression for example, be flexible foams such as urethane foam etc.Like this, by the encapsulant layer 14 of configuration foamed material or soft material below the key top, can when improving the button feel, reach slimming.
Above-mentioned foamed material or soft material are not necessarily leaveed no choice but fill, and also can go into the thin slice of foamed material or soft material to above-mentioned encirclement spatial interpolation.In addition, also there is no need necessarily to be provided with buffering liner 3.
Figure 16 represents the embodiment 7 of thin button sheet of the present invention.The relevant thin button sheet 1A of embodiment 7 therewith, as shown in figure 15, the ten key 2a that represent letter, mark and/or numeral respectively, have power supply unlatching, close, a plurality of buttons of the buttons such as cursor key 2c of the function key 2b of functions such as the cut-out of electric wire, mail and center upper portion part are as a plurality of keys top 2 independent respectively formation.Key top the 2, the 2nd, the structure that moves up and down independently respectively with separate component according to each ten key 2a, 2b and 2c.
In addition, though structure not necessarily, between being provided with in mode around the peripheral part on key top 2 across pad 9 fixing button frame 13 on tellite 5.
In Figure 16, liner 3 is attached to the upper surface of the tellite 5 that is provided with Wiring pattern 5a.And as shown in the figure, keep projection state to a certain extent, can not make the shape collapse, when keeping shape, solidify, keep specific resiliency because of flowing.Periphery inboard along the back side of ten key 2a (with reference to Fig. 3), by making liner 3 extend (with reference to Fig. 5) with " continuous river levee " shape, between above-mentioned key top 2 and configuration tellite 5 thereunder, produced the space, therefore, with described embodiment 1 same encapsulant layer 14 to this space filled and process material or soft material.Also have, also can liner 3 be arranged on the tellite 5, replace encapsulant layer 14, insert configuration to above-mentioned space and be configured as the foamed material of regulation shape or the thin slice of soft material.
The outward appearance of the embodiment 8 of thin button sheet of the present invention is identical with Fig. 9.Button piece 1B (with reference to Fig. 9's) that embodiment 8 is relevant is configured to therewith, remove be provided with on the key top 2 of button piece 1 in described embodiment 1, with the regional corresponding of each button 2a, 2b and 2c and distinguish each regional groove 2e (with reference to Fig. 1～3), an elasticity of pushing up 2 metallic plate by the formation key just can be pushed the structure that can move up and down of metal dome.Between the key top 2 and printed wiring board 5 of the button piece 1B relevant, also be provided with the filling material bed of material 14 (omitting diagram) with present embodiment.
Thereby, distortion when occurring in stress application and irreplaceable problem for the key top 2 of the key top 2 that do not make button piece 1B and described button piece 1 is the same, the key of button piece 1B pushes up 2 thickness and is set to 0.2mm.Button piece 1B is except said structure, and the structure with button piece 1 is identical basically.About this identical structure division, identical mark when using, omission explanation with explanation button piece 1.
Figure 17 and Figure 18 represent the embodiment 9 and the variation thereof of thin button sheet of the present invention.The relevant thin button sheet 1C of embodiment 9 therewith, has the basic structure roughly the same with the button piece 1A of embodiment 7, ten key 2a with expression letter, mark and/or numeral, have power supply unlatching, close, a plurality of buttons of the buttons such as cursor key 2c of the function key 2b of functions such as the cut-out of electric wire, mail and center upper portion part are as the 2 independent respectively keys tops 2 that form, a plurality of keys top.Each key top 2 is made of transparent hard resin such as Merlon (PC) resin, polyacrylic resin (PMMA).
Follow in this, be formed with the text printout layer 12 of positive or negative sheet at the back side on each key top 2, form EL element 6 in the mode that covers this literal printed layers 12.By the light that sends from this EL element 6, illuminate the various literal of the expression keypress function that is formed at text printout layer 12 etc.The table back side of the Wiring pattern 5a of tellite 5 connects by the through hole 5b that is covered by conducting rubber or conductivity China ink 5c.That Figure 18 represents is the variation 1D of button piece 1C, as this button piece 1D, also can form the through hole 5b of the opening of the structure of simplifying the Wiring pattern 5a that connects the table back side in tellite 5.In addition, key top 2 is under the situation of transparent hard resin system, and above-mentioned text printout layer 12 also can be located at the surface (upper surface) on key top 2 but not the back side (also identical in following embodiment).
In Figure 17,, form encapsulant layer 14 by filling to the sunk part of tellite 5 upper surfaces or injecting foamed material or soft material.The details of this encapsulant layer 14 is represented by the local amplification sectional view in the circle.
The foamed material or the soft material that constitute above-mentioned encapsulant layer 14 are not necessarily leaveed no choice but fill or inject, and also can insert the thin slice of foamed material or soft material in above-mentioned sunk part.In the case, there is no need necessarily to be provided with liner 3.
The button piece 1C of this embodiment 9 and the outward appearance of 1D, roughly the same with button piece 1A shown in Figure 7. Button piece 1C and 1D are except said structure, and the structure with button piece 1 and 1A etc. is identical basically.About identical structure division, identical mark when using, omission explanation with explanation button piece 1.And 2 is under the resinous situation on key top, also can not form text printout layer 12 overleaf, (is exposed to outside upper surface and side) on its surface by covering with paint, lacquer, colour wash, etc. to wait and applies suitable decoration, the tone of formation outward appearance or literal etc.
Figure 19 to Figure 21 represents embodiment 5 and two variation of thin button sheet of the present invention.Relevant thin button sheet 1E and variation 1F and the 1G of embodiment 10 therewith, identical with the various embodiments described above, ten key 2a with expression letter, mark and/or numeral, have power supply unlatching, close, the key top 2 (or metallic or resinous independent key top 2 that forms) of integrated metallic that a plurality of buttons of the buttons such as cursor key 2c of the function key 2b of functions such as the cut-out of electric wire, mail and center upper portion part form as one.
The back side on each key top 2 of the transparent resin system of button piece 1E shown in Figure 19 is formed with the text printout layer 12 of positive or negative sheet.On Figure 20 and button piece 1F, 1G shown in Figure 21, be provided with the through hole 2d that forms shapes such as literal.In these button pieces 1E, 1F and 1G, EL element 6 is not to be formed at the back side on each key top 2 by printing, but is configured to be formed at by printing the surface and the metal dome 4 of the sheet button piece covering tellite 5 on the resinous film.
And the key shown in Figure 20 top a plurality of buttons of 2 set form broader one, until the pad 9 that this figure right-hand member exists above.In the case, encapsulant layer 14 do not have to be filled or to be paved with under the situation of liner and right-hand member pad 9 between recess.
The outward appearance of button piece 1E, 1F and 1G, roughly the same with Fig. 7 and button piece 1A or 1B shown in Figure 9 respectively.Button piece 1D, 1E and 1F are except said structure, and the structure with button piece 1 and 1A etc. is identical basically, therefore about this same structure division, and identical mark when using, omission explanation with explanation button piece 1.
As mentioned above, the key of thin button sheet of the present invention top is made of metallic plates such as resin or SUS.Thus, the thickness limit on key top 2 is that the situation of resin is that (integral body: 1.05mm), the situation of SUS is about 0.2mm (0.1～0.3mm/ integral body: 0.75mm or 0.65mm) to 0.6mm, and can make the thickness from the key top surface to substrate surface is 0.6～1.1mm.
The EL element of using as the light source of the literal of be used to throw light on each button 2a, 2b of expression and 2c function etc. 6 is carried out distribution to described EL element 6 by form copper wiring pattern on tellite 5, constitutes the integrated thin button sheet of EL.On key top 2 is under the metal situation, illuminated in order to form, and also can form the through hole of literal shape by etching method or suitable method.
On key top is under the situation of metal, can all key tops is integrated, constitute the airtight construction that clips by key top and circuit substrate (with reference to Fig. 2, Fig. 9).Metallic plate is not limited only to SUS, so long as there is suitable flexible metal just passable.
Preferably, constitute the button piece module that is assembled as one, constitute the thin button sheet in this way as push-button unit with tellite (PCB) 5 grades.
Below key top 2 and clip metal dome 4 between the tellite 5.Metal dome 4 is to be made by the material that has conductivity and have for example phosphor bronze and so on of shape memory, and is dome-shaped because of having, so gain the name.It is dome-shaped that metal dome 4 not necessarily must form this kind, as long as its shape and structure can meet the following conditions: pushed up 2 o'clock pressing key, the reliable closed normal opened contact of energy, and pushed up 2 o'clock stopping to press key, shape can return to original state.The effect of metal dome 4 is, when specific key top 2 is pressed, in response to the motion of pressing of metal dome element, closed configuration thereunder be printed the normal opened contact of distribution on tellite 5, form circuit.
As mentioned above, after having disposed metal dome 4 on the surface of tellite 5, in order to fix each metal dome 4 it is not offset from the position, the surface coverage of tellite 5 has sheet (for example, thin slice such as PET) as thin as a wafer.In Figure 15, illustrate that cover on the hole of through hole 5b is exactly this thin slice 5d.Can be understood as and cover too on the metal dome 4.
2 is under the resinous situation on key top, and surface or lower surface uses various trailings arbitrarily thereon, and enforcement comprises the decoration of the literal of representing each keypress function, mark etc.Even button is under the metal situation, for button piece being applied the outward appearance of metal tone simply and using, can carry out various coverings with paint to its surface if not only.
Industrial applicibility
The present invention relates to be applied to the mobile apparatus of mobile phone, handheld terminal (PDA) etc. Therefore thin key sheet, headed by the manufacturing industry of e-machine and various members thereof, possesses in pursuit In the industrial field of the slimming of these machines of button, have and utilize widely possibility.
Claims (18)
1. a thin button sheet is characterized in that,
Comprise:
Single or multiple keys top, it be metallic or resin system, has the demonstration of the literal of representing keypress function, mark, figure etc.; With
The buffering liner, the back side that it is arranged on this key top has suitable elasticity.
2. thin button sheet as claimed in claim 1 is characterized in that,
The back side on described key top, the light source as the demonstration that is used for literal, mark, figure etc. to the expression keypress function is thrown light on is formed with the EL light source of being made up of EL element by printing.
3. thin button sheet as claimed in claim 1 is characterized in that,
The back side on described key top, the light source as the demonstration that is used for literal, mark, figure etc. to the expression keypress function is thrown light on disposes EL element and arranges the EL light source that forms on the resin film of desired shape.
4. a thin button unit is characterized in that,
Comprise:
Single or multiple keys top, it be metallic or resin system, has the demonstration of the literal of representing keypress function, mark, figure etc.; With
Tellite, it is formed with by the circuit pattern of pushing the open and close of carrying out circuit to this key jacking row,
Utilization be disposed between described key top and the tellite, have suitable flexible buffering liner, the described key that is adhesively fixed pushes up and tellite.
5. thin button as claimed in claim 4 unit is characterized in that,
The back side on described key top, the light source as the demonstration that is used for literal, mark, figure etc. to the expression keypress function is thrown light on is formed with the EL light source of being made up of EL element by printing.
6. thin button as claimed in claim 5 unit is characterized in that,
By the contact electrical connection that realize to described each EL element of Wiring pattern with the contact projection, wherein said Wiring pattern is formed on the back side, key top by the one-tenth embrane method of metallic films such as evaporation, sputter, and the conducting rubber that described contact projection is provided with by the Wiring pattern at tellite etc. forms.
7. thin button as claimed in claim 4 unit is characterized in that,
The back side on described key top, the light source as the demonstration that is used for literal, mark, figure etc. to the expression keypress function is thrown light on disposes EL element and arranges the EL light source that forms on the resin film of desired shape.
8. thin button as claimed in claim 4 unit is characterized in that,
Described buffering liner, it is resin with UV cured property, thermosetting etc., under aqueous state, form by distributor supply or printing, make its back side or tellite surface form wire or point-like on the key top, make its sclerosis after on tellite, having disposed the key top, bonding key top and tellite.
9. thin button as claimed in claim 4 unit is characterized in that,
Thickness was about 0.6mm when described key top was resin system, and thickness is 0.1～0.3mm when being metallic, and the thickness from the key top surface to the tellite surface is 0.6～1.1mm.
10. thin button as claimed in claim 4 unit is characterized in that,
Corresponding to the switch key element on the described tellite, at the back side, key top, make its sclerosis after supplying with aqueous resin by distributor, perhaps form push projection by printing.
11. a thin button unit is characterized in that,
Comprise:
Single or multiple keys top, it be metallic or resin system, has the demonstration of the literal of representing keypress function, mark, figure etc.; With
Tellite, it is formed with by the circuit pattern of pushing the open and close of carrying out circuit to this key jacking row,
On above-mentioned key top and be disposed between the above-mentioned tellite below it, accompany soft materials such as foamed material such as urethane foam or various soft elastomers.
12. thin button as claimed in claim 11 unit is characterized in that,
The back side on described key top, the light source as the demonstration that is used for literal, mark, figure etc. to the expression keypress function is thrown light on is formed with the EL light source of being made up of EL element by printing.
13. thin button as claimed in claim 12 unit is characterized in that,
To the following realization of the distribution of described each EL element: by the contact projection that is made of conducting rubber etc., the one-tenth embrane method that connects by metallic films such as evaporation, sputters is formed at the Wiring pattern at the back side, key top and the Wiring pattern of tellite.
14. thin button as claimed in claim 11 unit is characterized in that,
The back side on described key top, the light source as the demonstration that is used for literal, mark, figure etc. to the expression keypress function is thrown light on disposes EL element and arranges the EL light source that forms on the resin film of desired shape.
15. thin button as claimed in claim 11 unit is characterized in that,
Thickness was about 0.6mm when described key top was resin system, and thickness is 0.1～0.3mm when being metallic, and the thickness from the key top surface to the tellite surface is 0.6～1.1mm.
16. thin button as claimed in claim 11 unit is characterized in that,
Corresponding to the position of the switch key element on the described tellite, at the back side, key top, make its sclerosis after supplying with aqueous resin by distributor, perhaps form push projection by printing.
17. thin button as claimed in claim 11 unit is characterized in that,
Between above-mentioned key top and the tellite that is disposed at below it, accompany: have soft materials such as foamed material such as suitable flexible buffering usefulness liner and urethane foam or various soft elastomers along the periphery inner surface setting on key top.
18. thin button as claimed in claim 17 unit is characterized in that,
Described buffering liner, it is resin with UV cured property, thermosetting etc., under aqueous state, form by distributor supply or printing, make its back side or tellite surface form wire or point-like on the key top, make its sclerosis after on tellite, having disposed the key top, bonding key top and tellite.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP378678/2004 | 2004-12-28 | ||
| JP2004378678 | 2004-12-28 | ||
| JP016253/2005 | 2005-01-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101091230A true CN101091230A (en) | 2007-12-19 |
Family
ID=38943792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200580044970 Pending CN101091230A (en) | 2004-12-28 | 2005-12-28 | Thin key sheet and thin key unit incorporating the thin key sheet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101091230A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102148103A (en) * | 2010-02-06 | 2011-08-10 | 卢新华 | Membrane switch and manufacturing method thereof |
| CN101901708B (en) * | 2009-05-26 | 2014-02-19 | 嘉兴淳祥电子科技有限公司 | New process for producing keycaps of computer keyboard |
-
2005
- 2005-12-28 CN CN 200580044970 patent/CN101091230A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101901708B (en) * | 2009-05-26 | 2014-02-19 | 嘉兴淳祥电子科技有限公司 | New process for producing keycaps of computer keyboard |
| CN102148103A (en) * | 2010-02-06 | 2011-08-10 | 卢新华 | Membrane switch and manufacturing method thereof |
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