矽橡胶按键(Rubber Key)设计.doc

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Rubber Key按鍵基本結構塑膠面Plastic Cap鍵面Key Top (鐳射雕刻、滴膠、噴/Laser Etching、Potting、Coating)可選擇顏色按鍵 Optional Color Insertion Key斜壁Wall導電部份(接触) Conductive Part (Contact)氣坑Air Path2. 矽橡膠按鍵按力-行程曲線圖按力 ForceFP峰值控力(Fmax)Peak Force (Fmax)FC接触點按力Contact Force 按力 ForceFR最小回彈力(Fmin)Min. Return Force(Fmin) (gram)FM最大回彈力Max. Return Force FD落差力(FD = FP FC)Drop Force (FD = FP FC)FG損耗力(FG = FP FM)Gap Force (FG = FP FM)行程 StrokeS1峰值行程Peak StrokeS2接触點行程Contact Stroke位置 LocationO起始點Original Point 行程P峰值點Peak Point StrokeC接触點Contact Point (mm)R回彈點Return PointM最高回彈力點Max. Return Point位移TravelO-P預載位移Pre-load TravelP-C至接触點位移Travel To ContactC-S壓縮段位移Post TravelS-R-M-O回彈位移Return Travel3. 不同結構矽橡按鍵特征性能及用途Rubber Key 類型圖示行程、壓力曲線Rubber Key 特性Flat Cone Type Force Range 按力範圍0 350gramsStroke Range行程範圍0.5 3.0mmCycle Life壽命 (×103)500 2,000Typical Uses主要用途Telephone, Remote Control, Automotive, Radio, Toys, Calculator,.etc.電話、搖控器、收音機、玩具、計算器等。Top Cylindrical Type Force Range 按力範圍0 250gramsStroke Range行程範圍0.7 1.5mmCycle Life壽命 (×103)500 2,000Typical Uses主要用途Telephone, Remote Control,Toys, Games, Calculator,. etc.電話、搖控器、玩具、遊戲機、計算器等。Flat Dome TypeForce Range 按力範圍30 150gramsStroke Range行程範圍0.5 3.0mmCycle Life壽命 (×103)1,000 3,000Typical Uses主要用途Telephone, Remote Control, Toys, Measuring Instruments, Office Machine.電話、搖控器、微型測量儀、辦公室設備。Double ConeForce Range 按力範圍30 80gramsStroke Range行程範圍2.0 4.0mmCycle Life壽命 (×103)5,000 20,000Typical Uses主要用途Computer, Typewriter,. etc電腦, 打字機等。 Ring DomeForce Range 按力範圍30 200gramsStroke Range行程範圍1.0 2.5mmCycle Life壽命 (×103)500 3,000Typical Uses主要用途Telephone, Typewriter, Test Instruments, . etc.電話、打字機。試驗儀器等。Ring Dome TopForce Range 按力範圍20 80gramsStroke Range行程範圍0.2 1.0mmCycle Life壽命 (×103)500 10,000Typical Uses主要用途Remote Control, Calculator, Typewriter, Computer,.etc.搖控器、計算器、打字機、電腦等。二. 矽橡膠按鍵結構設計1. Rubber Key設計的功能要求.按動按鍵時能達到設定的功能;.撤除外力后, 按鍵能自動、完全复位;.按鍵在按動和复位過程中有良好的手感, 無阻、滯、澀的感覺;.保証按下按鍵邊緣位置時亦有作用。2. Rubber Key結構設計要點.圖示1. 外圓每半徑為1.0至1.5mm.2. 最小半徑為0.3mm.3. 最小內圓角半徑為0.2mm.4. 定位孔至斜壁邊緣線不小於1.0mm.5. 最小定位孔徑為1.0mm6. 斜壁底間距比a大2.0mm.7. 鍵面圓角半徑不小於0.25mm.8. 鍵面頂邊圓角半徑不小於0.2mm.1. Typical outside radius is 1.0 to 1.5mm.2. Minimum radius is 0.3mm.3. Minimum inside radius is 0.2mm.4. Spacing between the edges of a rubber dome and a guide hole is 1.0mm or more.5. Guide holes are a min. 1.0mm in diameter.6. The width of a rubber dome base is typically 2.0mm more than a.7. The minimum radius for the side edges of key top is 0.25mm.8. The minimum radius for the top edges of key top is 0.2mm.技術要求 (in drawing sheet供參考,任選)a.Actuation force: 130±35 gramsb. Tactile feedback required.c. Expected life cycle: 1 × 105minimumd. Silicone rubber hardness: 50 60°.e. Contact resistance less than 200 ohmsf. Stroke = 1.0 (or1.5) mm.g. Thickness of carbon pill = 1.0mm.h. Contact bounce less than 12m seconds.i. Pad color:optional.j. Graphic printing: optional.3. Rubber Key與塑膠殼配合.一般設計規則A & B : dimensions of plastic塑膠殼鍵孔的尺寸a & b : dimensions rubber矽橡膠鍵鈕的尺寸合理比例為A a 0.3mm, B b > 0.2mm (具體取值見下表)R : the corner radius of plastic塑膠鍵孔圓角的半徑r : the corner radius of rubber矽橡膠鍵鈕圓角的半徑1mm R 1.25mm, 0.75mm r 1mm is better合理比例為1mm R 1.25mm, 0.75mm r 1mmH : the dimension of key tops & plastic鍵鈕露出膠殼的高度S : the stroke of key pad鍵鈕的行程合理比例為H S 0.5mmD-d = 1.5 2.0mm is preferred合理比例為D-d = 1.5 2.0mmP : diameter of post 小柱直徑t : the gap between post & conductive pill 小柱興導電粒頂部之間的的距離.P: 1.0mm is preferred 標准尺寸1.0mm.t = 0.1 0.15mm is preferred 標准尺寸t=0.1 0.15mmFc : click force 接触點動Fc= F1 - F2 >25g is preferred 標准數据 Fc=F1 - F2 >25g間隙值推荐選擇表 按鍵外形、尺寸、行程大小是影響按鍵設計間隙值大小的主要因素, 一般情況下, 外形簡單, 尺寸、行程小, 配合間隙取值就小, 反之則大。Rubber Key與塑膠殼配合間隙值見下表:Rubber Key與塑膠殼配合間隙推荐值表(全部為單邊間隙)a. Rubber 行程為1.0mm 尺寸 分類1 1010 2020 3030 4040 5050 0.100.100.120.150.30-0.100.120.15-0.100.120.150.180.20-多邊形-0.180.300.35-異形-0.150.20-b. Rubber 行程為1.5mm 尺寸 分類0 1010 2020 3030 4040 5050 0.100.120.140.16-0.120.140.16-0.120.140.16-多邊形-0.200.30-異形-0.160.20-c. Rubber 行程為2.0mm 尺寸 分類0 1010 2020 3030 4040 5050 0.100.120.140.16-0.120.160.18-0.120.160.18-多邊形-0.250.35-異形-0.180.22-.一般尺寸公差Length(mm)< 1020304050> 50Tolerance(mm)± 0.1± 0.15± 0.2± 0.25± 0.30.6 %.彈力範圍的一般精度 Force (g)507090100120150170200 250Tolerance(g)± 15 20± 20 25± 20 30± 25 35± 25 35± 30 40± 35 40 ± 50三. Rubber與PCB的裝配方式1. Rubber Key的裝配方式示 意 圖說 明a. 采用拉腳固定b. 拉腳與PCB之間采用過盈配合c. 一般過盈最量取0.3mmd. 拉腳過盈部分高度取2.0mme. Rubber Key與面殼配合間隙一般取單邊0.2 0.3mma. 采用柱仔定位,用PCB將Rubber key壓在膠殼上b. Rubber key上定位孔A2mmc. 與柱仔間采用間隙配合, 一般取0.5mm;d. PCB相應位置沖孔與定位柱仔間也采用間隙配合, 0.15mm.4. Rubber + Key Top (Button) 裝配方式.多粒Rubber的裝配方式 a. Rubber與PCB采用拉腳固定或柱仔定位;b. Key Top的十字形骨壓在Rubber上, 預壓量0.2mm.單粒Rubber裝配方式a. Rubber上開十字型槽, Key Top上做十字型骨;b. Rubber與Key Top配合稍帶過盈, 配裝配后不致晃動;c. Rubber預壓量 0.2mm。a. 左圖為單粒小Rubber與Key Top的配合方式;b. Key Top的Boss上有一小孔;c. Rubber頂端小圓柱與Key Top為過盈配合, 過溫量: 0.1mm, 保証小粒Rubber 不晃動;d. Rubber預壓量: 0.2mm;e. Rubber與PCB采用拉腳固定。三. Rubber Key的選用1. Rubber Key在選用時應考慮以下三點.Rubber Key行程.回彈力.預壓量(Rubber受壓部位的高度須大于按鍵與PCB之間的距离, 以使按鍵常態時不致晃動, 預壓量一般取0.2mm)。下表為一般選用實例:應用例子Applications行程Stroke(mm)按力Actuation Force(g)耐用力Durability(×103 cycles)計算器Calculators0.2-3.530-80300-1,000音響設備Audio Equipment0.3-1.560-150100-500汽車音響Car Radios & Stereos0.3-1.060-200100-500電視及錄影機TV & VTR0.1-1.530-100300-1,000通話器Transmitters03.-1.580-150300-1,000按鈕電話Push-button Telephones1.2-3.570-2001,000-3,000電子遊戲Electronic Games0.2-1.530-150500-1,000音樂器材Musical Instruments0.7-3.530-701,000電腦鍵盤Computer Terminals2.0-4.040-905,000-10,000電動打字機Electric Typewriters3.0-4.040-705,000-10,000印字機Printer1.0-3.530-80500-1,000測量儀器Instrument Measuring0.3-1.530-100100-300搖控器Remote Control0.3-1.550-150300影印/傳真機Copy / Fax Machine0.2-1.530-150100五. Rubber Key附屬設計部分1. 導電粒一般設計規格項目Items 導電粒的標准尺寸Standard Sizes圓形Circle 2、2.5、3、3.5、4、4.5、5、5.5、6、7、8方形Square 適宜做絲印導電油墨,尺寸不限制橢圓形Ellipse Conductive ink printings contact is recomended, size is flexible導電粒電阻值 施加100g力之下,小于150壽命 30,000,000印刷型電阻值 施加300g力之下,小于800壽命 1 × 106Conductive Pill Resistance Less than 150 ohms with 100 grams loadingLoad 30 millionPrint Type Resistance Less than 800 ohms with 300 grams loading2. 絲網印刷一般概念鍵鈕表面字體或圖形絲印Button Graphics鍵鈕表面全色絲印Full Surface Printing A中心點公差為±0.3mm(Graphics Offset center±0.3mm) 耐磨損能力: 能扺受RCA絲印壽命測試儀按照IU4001 PORA 5.3.1 e之2018664規格摩擦15次Abrasion Resistance: All must pass 15 cycles minimum wear on RCA Abrader, 2018664 per IU4001 PORA 5.3.1e六. Rubber Key性能及測試1. 矽橡膠機械及電器性能非導電硅Non-Conductive Silicone導電硅Conductive Silicone使用溫度Temperature For Use- 50 - + 250- 50 - + 250單位比重Specific Gravity1.161.18拉力強度Tensile Strength80 Kg /cm250 Kg /cm2撕裂強度Tear Strength20 Kg / cm12 Kg / cm壓縮率Compression Set60% (180 × 22hrs.)28% (150 × 22hrs.)破壞伸度Elongation At Break310%220%電阻率Specific Resistively1 × 1015 .cm4 .cm接触電阻Contact Resistance-< 100 接触電流量(DC)Contact Rating (DC)-12V 30 mA接触起彈時間Contact Bounce-< 20 msec.諧震時間Chattering-< 5 msec.絕緣度Insulation Breakdown26k V / mm-介質常數Dielectric Constant4.2 (50 Hz)-介質正切Dielectric Tangent13% (50 Hz)-顏色Color可選加顏色 Coloring Possible黑色Black2. 矽橡膠按鍵壽命測試橡膠按鍵之壽命測試 (Life test for rubber key)初期曲線Initial Stage經3,000,000次后的曲線3,000,000 cycles壽命測試方法是用15mA DC以每秒三次的速度將鍵鈕按下接触線路板The durability test was conducted by operating a key at a rate of 3 times/sec with a current of 15mA DC applied on the Cu-Au plate PC board.七DA 設計評審內容1.從結構上檢查其對應的性能,用途是否與設計要求一致.2. (1)定位孔至斜壁邊緣線距離不小于1.0mm;(2)定位孔不小于1mm;(3)鍵面圓角半徑不小于0.25mm. 3. (1)塑膠殼與Rubber Key的間際需滿足表中規定. (2)H-S 0.5mm4. (1)與PCB的裝配方式; (2)Rubber預壓量(一般為0.2mm)5.Rubber Key表面絲印測試參考QAD-TEI-011.6. 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