Wiperassemblywitharmheadlockingmember.docx

Wiperassemblywitharmheadlockingmember.docx

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Wiperassemblywitharmheadlockingmember

Wiperassemblywitharmheadlockingmember

BACKGROUNDOFTHEINVENTION

ThisapplicationclaimsthebenefitofKoreanPatentApplicationNo.2003-88421,filedonDec.6,2003,intheKoreanIntellectualPropertyOffice,thedisclosureofwhichisincorporatedhereininitsentiretybyreference.

1.FieldoftheInvention

Thepresentinventionrelatestoawaferassembly,andmoreparticularly,toawiperassemblydesignedtosimplycombineorseparateashaftwithorfromanarmhead.

2.DescriptionoftheRelatedArt

Awaferassemblyisapartofasystemforcleaningthesurfaceofawindowofavehicle.ReferringtoFIGS.1and2,aconventionalwiperassembly100includesashaft110,anarmhead120,andanarm130inordertocleanawindow200ofavehicle.Theshaft110isconnectedtoadrivingmotor102viaalinkage104androtatedbythedrivingmotor102.Thearmhead120hasashafthole122,intowhichtheshaft110isinserted,androtateswitharotationoftheshaft110.Oneendofthearm130iscombinedwiththearmhead120byarotatingshaft132andpivotableabouttherotatingshaft132,andtheotherendiscombinedwithawiperblade134whichwipesthewindow200.

Acouplingspring136isinstalledbetweenthearmhead120andthearm130.Thecouplingspring136contributestocloselyadheringthewiperblade134tothewindow200.Morespecifically,thecouplingspring136isinstalledsuchthatwhenauserpivotsthearm130abouttherotatingshaft132soastobedistantfromthewindow200andfoldsthearm130tomakeanangleequaltoorgreaterthanapredeterminedangle,thefoldedstatecanbemaintained.Whenthearm130makinganapproximatelystraightlinewiththearmhead120isfoldedsoastobedistantfromthewindow200,andthefoldedstateismaintainedasdescribedabove,ausercanconductoperations,suchaswipingofthewindow200orreplacementofthewiperblade134withanewone.

Thearmhead120,towhichthearm130iscoupled,iscombinedwiththeshaft110,whichisconnectedtothedrivingmotor102viathelinkage104androtateswitharotationofthedrivingmotor102.Thecombinationofthearmhead120withtheshaft110mustbestrongbecauseahighrotatingforceofthedrivingmotor102mustbedeliveredtothearmhead120.Atthesametime,amethodofcombiningorseparatingthearmhead120withorfromtheshaft110mustbesimple.

Theconventionalwiperassembly100usesalockingmember140tocombineorseparatethearmhead120withorfromtheshaft110.Thelockingmember140rotatablyfitsontoafirstprotrusion124formedinthearmhead120andiselasticallybiasedtowardtheshaft110byacoilspring160installedbetweenthelockingmember140andthearmhead120.Oneendofthecoilspring160isfixedintoaspringnotch142ofthelockingmember140,andtheotherendisfixedtothearmhead120.Acover150isinstalledonasideofthelockingmember140oppositetothearmhead120andfixedtoapairofsecondprotrusions126,protrudingfromthearmhead120,andthefirstprotrusion124usingscrews152.Astopper144isformedononeendofthelockingmember140.

Intheconventionalwiperassembly100havingsuchastructure,theshaft110isinsertedintotheshafthole122ofthearmhead120usingthefollowingmethod.First,ashafthead112approachestheshafthole122.Next,thelockingmember140thatblockstheshafthole122isrotatedaboutthefirstprotrusion124whileresistingtheelasticityofthecoilspring160sothatthelockingmember140isremovedfromtheentranceoftheshafthole122.Whilethestateofthelockingmember140unblockingtheshafthole122isbeingkept,theshafthead112isinsertedintotheshafthole122.Finally,whenthepowerappliedtothelockingmember140isremoved,thelockingmember140rotatesbacktowardtheshaft110becauseofarestoringforceofthecoilspring160,andoneendofthelockingmember140isplacedundertheshafthead112suchthattheshaft110isnotseparatedfromtheshafthole122.Ontheotherhand,theshaft110canbeseparatedfromthearmhead120byperformingtheabove-describedassemblingstepsinanoppositeorder.Morespecifically,thelockingmember140isrotatedtobedistantfromtheshaft110byresistingtheelasticityofthecoilspring160.Atthistime,theshaft110isseparatedfromtheshafthole122.

Sincetheshaft110intheconventionalwiperassembly100isinsertedintotheshafthole122ofthearmhead120whileanoperatorismaintainingthestateofthelockingmember140beingrotated,theoperatormustusebothhands.Also,sinceastronglyelasticcoilspringshouldbeusedtokeepastrongcombinationbetweentheshaft110andthearmhead120,rotatingthelockingmember140itselfwillbehard.Furthermore,averageconsumersotherthanskilledworkersmaynotcombineorseparatetheshaft110withorfromthearmhead120.

SUMMARYOFTHEINVENTION

Thepresentinventionprovidesawiperassemblydesignedtosimplycombineorseparateashaftwithorfromanarmhead.

Accordingtoanaspectofthepresentinvention,thereisprovidedawiperassemblyincludingashaft,anarmhead,anarm,alockingmember,andalockingmembermovingunit.Theshaftisconnectedtoadrivingmotorviaalinkageandrotatedbythedrivingmotor.Thearmheadincludesashaftholeintowhichtheshaftisinserted.Thearmhasoneendcombinedwiththearmheadbyarotatingshaftandrotatableabouttherotatingshaftandtheotherendcombinedwithawiperbladewhichwipesawindowofavehicle.Thelockingmemberissupportedbythearmheadandmovablebetweenalockinglocationwherethelockingmemberislockedintheshaftsothattheshaftcannotbeseparatedfromtheshaftholeofthearmheadandanunlockinglocationwherethelockingmemberisunlockedfromtheshaftsothattheshaftcanbeseparatedfromtheshaftholeofthearmhead.Thelockingmembermovingunitmovesingearwitharotationofthearmsoastomovethelockingmemberbetweenthelockinglocationandtheunlockinglocation.

BRIEFDESCRIPTIONOFTHEDRAWINGS

Theaboveandotherfeaturesandadvantagesofthepresentinventionwillbecomemoreapparentbydescribingindetailexemplaryembodimentsthereofwithreferencetotheattacheddrawingsinwhich:

FIG.1isaschematicviewillustratingthestateofaconventionalwiperassemblybeingused;

FIG.2isanexplodedperspectiveviewillustratingacombinationofanarmheadwithashaftofFIG.1;

FIG.3isanexplodedperspectiveviewofawiperassemblyaccordingtoanembodimentofthepresentinventionwhenviewedfromthebottomofthewiperassembly;

FIG.4isanexplodedperspectiveviewofthewiperassemblyofFIG.3viewedfromthetop;

FIG.5isabottomviewofapartofthewiperassemblyofFIG.3;

FIGS.6Athrough6Earecross-sectionalviewsillustratingamethodofassemblinganarmheadwithashaftinthewiperassemblyofFIG.3;

FIGS.7Athrough7Darecross-sectionalviewsillustratingamethodofseparatingashaftfromanarmheadinthewiperassemblyofFIG.3;

FIG.8isaschematiccross-sectionalviewofawiperassemblyaccordingtoanotherembodimentofthepresentinvention;and

FIGS.9Athrough9Earecross-sectionalviewsillustratingamethodofcombiningorseparatingashaftwithorfromanarmheadinawiperassemblyaccordingtostillanotherembodimentofthepresentinvention.

DETAILEDDESCRIPTIONOFTHEINVENTION

FIGS.3and4areexplodedperspectiveviewsofawiperassembly1accordingtoanembodimentofthepresentinventionwhenviewedfromthebottomandtop,respectively.ReferringtoFIGS.3and4,thewiperassembly1includesashaft10,anarmhead20,alockingmember40,alockingmembermovingunit,andacover60.

Theshaft10isconnectedtoadrivingmotor（notshown）usingalinkage（notshown）soastoberotatedandincludesanotch12,anaslantguide14,andapairofkeygrooves16.ThedrivingmotorandthelinkagearethesameasthoseoftheconventionalwiperassemblyofFIG.1.

Thenotch12isformedinashafthead11,whichisformedontheuppersurfaceoftheshaft10andhasadiametergreaterthanthatoftheshaft10.Theaslantguide14isformedabovethenotch12.Inotherwords,thelineoftheaslantguide14andthenotch12isparalleltotheaxiallineoftheshaft10.AsshowninFIG.4,theaslantguide14isinclinedtowardthecenteroftheshaft10.Thekeygrooves16areformedontheshafthead11alongthelengthdirectionoftheshaft10.Theouterlateralsurfaceoftheshafthead11oftheshaft10isknurled.

Althoughtheshafthead11isformedontheshaft10intheembodimentofFIGS.3and4,thenotch12,theshafthead11,whichiswiderthantheshaft10,maynotbeformedontheshaft10,andthustheaslantguide14,andthekeygroove16maybeformeddirectlyontheupperpartoftheshaft10.

Thearmhead20includesashafthole22,apairofkeys24,andguidepins26.Theshafthole22isinstalledsothattheshafthead11oftheshaft10isinsertedthereinto.Thekeys24areformedontheinnersurfaceoftheshafthole22andeachhaveashapesuchthatthekeys24canfitinthekeygrooves16oftheshaft10.Theinnersurfaceoftheshafthole22ofthearmhead20isknurledsuchastomatchwiththeknurledsurfaceoftheshafthead11asillustratedinFIG.5.Hence,theshaft10andthearmhead20canbestronglycombined,andarotatingtorqueoftheshaft10isdeliveredtothearmhead20withoutloss.

ReferringtoFIG.3,theguidepins26protrudedownwardfromthearmhead20.Thenumberofguidepins26isfour.

Oneendofthearm30iscombinedwiththe