SI22161A

SI22161A - Heating windshield wiper for cleaning windshields of vehicles

Info

Publication number: SI22161A
Application number: SI200500309A
Authority: SI
Inventors: Peter Vrhovec
Original assignee: Peter Vrhovec
Priority date: 2005-11-09
Filing date: 2005-11-09
Publication date: 2007-06-30

Abstract

Subject of the invention is a heated windshield wiper for cleaning windshields of vehicles. The windscreen wiper (20) features a longitudinal, spring based supporting element (10) bent around its surfaces where on its concave side in the direction of the windscreen a rubber wiper (16) is applied, which is fitted to the glass and features on both longitudinal sides one open longitudinal groove (32) each containing a spring (26) which belongs to the supporting element (10). The supporting spring (26) is along its whole length adapted and equipped with a windscreen wiper heating element (20). In order to enable an uninterrupted operation of the wiper (20) also in colder periods and at the same time ensure also a relative movement between the supporting element and the windscreen wiper, the heating element (40) is located along the whole length inside the spring (26) of the supporting element (10), which consists of an electrically resistive material. The specified solution of heating the windscreen wiper eliminates the phenomena of accumulating ice along the whole length of the windscreen wiper (20) with emphasis on the tip of the windscreen wiper (16) since this way it always ensures its flexibility which is of paramount importance. The windscreen is thus wiped without annoying traces which enhances the comfort inside the vehicle and increases the safety of vehicles during work and in traffic.

Description

SlovenijaSlovenia

Ogrevani brisalec za čiščenje vetrobranskih stekel pri vozilihHeated windscreen wiper for vehicles

Predmet izuma je ogrevan brisalec za čiščenje vetrobranskih stekel pri vozilih.The subject of the invention is a heated windscreen wiper for vehicles.

V avtomobilski industriji so že poznani podobni ogrevani brisalci te vrste. En primer je opisan v patentni prijavi DE 102 34 267 Al. V navedeni patentni prijavi ima brisalec ogrevalni element nameščen na konveksno stran brisalne metlice.In the automotive industry, similar heated wipers of this type are already known. One example is described in patent application DE 102 34 267 Al. In the said patent application, the wiper has a heating element mounted on the convex side of the wiper blade.

Takšna izvedba sicer omogoča gretje brisalca in s tem taljenje ledu oziroma odpravljanje vlage na brisalcu, vendar ima slabo lastnost, da je poraba električnega toka precej velika. Neugodna je tudi visoka temperatura ogrevalnega elementa v brisalcu.Such an embodiment allows the wiper to be heated and thus to melt the ice or eliminate moisture on the wiper, but it has the poor property that the power consumption is quite high. The high temperature of the heating element in the wiper is also inconvenient.

Druga slaba stran v patentni prijavi DE 102 34 267 Al opisanega ogrevanja brisalca je tudi dejstvo, da je ogrevalni element nameščen na konveksni strani v brisalec vgrajene lamele, saj je zato razdalja med ogrevalnim elementom in konico metlice brisalca večja.Another disadvantage in patent application DE 102 34 267 Al of the wiper heating described above is the fact that the heating element is mounted on the convex side of the wiper blade, since the distance between the heating element and the wiper blade tip is longer.

Naslednja slaba stran patentni prijavi DE 102 34 267 Al opisanega ogrevanja brisalca je prehitro staranje materialov tako imenovanega prekrivnega elementa in s tem povezan razpad gume na konveksni strani brisalca, ki ga povzroča povišana temperatura ob gretju brisalca na konveksni strani.Another disadvantage of patent application DE 102 34 267 Al of the wiper heating described above is the premature aging of the materials of the so-called overlay element and the associated degradation of the rubber on the convex side of the wiper caused by the elevated temperature when the wiper is heated on the convex side.

Zaželeno pa je, da je grelni element kar se da blizu konice brisalca, saj mora zaradi svoje funkcije ostati ves čas fleksibilna. Pri nizkih temperaturah se namreč v utorih in na sami konici voda spreminja v led, zaradi česar brisalec postane neprožen, kar posledično onemogoča popolno brisanje sferno upognjeno površino vetrobranskega stekla motornih vozil, kakršna so dandanes v splošni rabi. Zaradi togosti brisalca, ki jo povzroči zmrznjena voda, se brisalna metlica, oziroma njena konica, ne more prilagoditi krivinskim radijem vetrobranskega stekla, ki se na steklu spreminjajo glede na obratovalni položaj brisalca. Za popolno brisanje je nujno potrebno tesno prileganje metlice brisalca površini stekla, za takšno prilagajanje pa je nujno potrebno relativno gibanje med nosilnim elementom in brisalno metlico, ki pa je zaradi zmrznjene vode onemogočeno. Problem se odpravi z ogrevanjem brisalca.However, it is desirable that the heating element is as close to the tip of the wiper as possible, because of its function it must remain flexible throughout. At low temperatures, in the grooves and at the very tip, the water changes to ice, which makes the wiper flexible, which in turn makes it impossible to completely wipe the spherically bent surface of the windscreen of motor vehicles, as they are now in common use. Due to the rigidity of the wiper caused by the freezing water, the wiper blade or the tip thereof cannot be adjusted to the curvature radii of the windscreen, which vary on the glass according to the operating position of the wiper. Full wiping requires a close fit of the wiper blade to the glass, and such adjustment requires relative movement between the support element and the wiper blade, which is prevented by frozen water. The problem is eliminated by heating the wiper.

Ogrevani brisalec (20) za čiščenje vetrobranskih stekel pri vozilih po pričujočem izumu ima podolgovat, prožen, vzdolž svojih ploskev upogljiv in upognjen nosilni element (10), ki ga sestavlja par vzmeti (26). Na vbočeni strani nosilnega elementa (19), to je konkavni ploskvi, je v smeri proti vetrobranskemu steklu nameščena gumijasta brisalna metlica (16), ki se prisloni na steklo. Gumijasta brisalna metlica (16) ima na obeh vzdolžnih straneh po en vzdolžni utor (32) za posamezno vzmet (26) nosilnega elementa (10).The heated windscreen wiper (20) for vehicles according to the present invention has an elongated, flexible, flexible and bent support element (10) consisting of a pair of springs (26) along its surfaces. On the convex side of the support member (19), i.e. the concave surface, a rubber wiper blade (16) is mounted in the direction of the windshield, which rests against the glass. The rubber wiper blade (16) has one longitudinal groove (32) on both longitudinal sides for each spring (26) of the support element (10).

Nosilna vzmet (26) je po svoji celotni dolžini prilagojena in opremljena tudi z elementom za ogrevanje brisalca (20). Za nemoteno delovanje brisalca (20) tudi v hladnih letnih obdobjih, pri čemer je zagotovljeno tudi relativno gibanje med nosilnim elementom in brisalno metlico, se ogrevalni element (40) namesti po celotni dolžini v notranjost vzmeti (26) nosilnega elementa (10). Ogrevalni element (40) je izdelan iz električno uporovnega materiala.The carrier spring (26) is adapted to its full length and is also provided with a wiper heating element (20). For smooth operation of the wiper (20) even during cold seasons, and also ensuring relative movement between the support element and the wiper blade, the heating element (40) is positioned along the entire length of the spring (26) of the support element (10). The heating element (40) is made of an electrically resistive material.

Navedena rešitev ogrevanja brisalca odpravlja kopičenje ledu na celotni površini brisalca (20), predvsem pa na sami konici metlice brisalca (16) in je tako vedno poskrbljeno za njeno fleksibilnost, kije bistvenega pomena. Vetrobransko steklo je tako vedno obrisano brez neprijetnih sledi, kar prispeva k udobju potnikov v vozilu in povečani varnosti vozil med delom in v prometu.This wiper heating solution eliminates the accumulation of ice over the entire surface of the wiper (20), and in particular at the very tip of the wiper blade (16), thus always ensuring its flexibility, which is essential. The windscreen is thus always wiped without any unpleasant traces, which contributes to the comfort of the occupants of the vehicle and to the increased safety of the vehicles during work and in traffic.

Ogrevani brisalec (20) za čiščenje vetrobranskih stekel pri vozilih po navedenem izumu ima ogrevalni element (40) iz električno prevodnega materiala vgrajen po celi dolžini posameznih vzmeti (26) in sicer v notranjosti posamezne vzmeti (26) nosilnega elementa (10), kar zagotavlja optimalno ogrevanje. Brisalec se namreč ogreva dejansko v njegovem središču in ne ogreva pretežno samo nosilnega dela brisalca, ampak je poudarek na sami konici brisalne metlice, ki je v stiku s sferno ukrivljenim steklom.A heated windscreen wiper (20) for vehicles according to the present invention has a heating element (40) made of electrically conductive material installed along the entire length of individual springs (26) inside the individual spring (26) of the support element (10), which provides optimum heating. Indeed, the wiper is actually heated in its center, and not only the carrier part of the wiper is heated, but the focus is on the tip of the wiper blade itself, which is in contact with the spherically curved glass.

V prečnem pravokotnem preseku je posamezna vzmet (26) nosilnega elementa (10) v glavnem pravokotne oblike. Za vgradnjo grelnega elementa je izdelan utor vzdolž cele dolžine posamezne vzmeti (26) nosilnega elementa (10) in sicer na določenem delu prečnega preseka posamezne vzmeti (26) nosilnega elementa (10). Utor je lahko na kateri od bočnih strani, na zgornji, ali pa na spodnji strani vzmeti (26). V posamezni izvedbi je lahko vzmet (26) nosilnega elementa (10) na delu, po katerem poteka v notranjosti grelni element, tudi delno preoblikovana ali odebeljena, ali pa je rob vzmeti (26) nosilnega elementa (10) dodatno oblikovan, kot je na primer prikazano na slikah 3, 4 in 5.In the rectangular cross-section, the individual spring (26) of the supporting element (10) is substantially rectangular. For the installation of a heating element, a groove is made along the entire length of each spring (26) of the supporting element (10), at a certain part of the cross-section of each spring (26) of the supporting element (10). The groove may be on either side, top or bottom of spring (26). In an individual embodiment, the spring (26) of the supporting element (10) may also be partially transformed or thickened on the part through which the heating element is internally provided, or the edge of the spring (26) of the supporting element (10) may be further shaped, such as the example shown in Figures 3, 4 and 5.

V posebno prednostni izvedbi je ogrevalni element zalit v vzmet (26) nosilnega elementa (10) s fleksibilnim in toplotno prevodnim materialom, saj tako poveča prevodnost toplote, ob tem pa še dodatno zaščiti ogrevalni element pred vplivi zunanjega okolja. S takim načinom ogrevanja brisalca, je poraba energije za ogrevanje navedenega brisalca dejansko zreducirana na minimum, kar se vpliva tudi na zahtevnost električne instalacije za delovanje.In a particularly preferred embodiment, the heating element is embedded in a spring (26) of the supporting element (10) with a flexible and thermally conductive material, thus increasing the conductivity of the heat, while further protecting the heating element from environmental influences. With this type of wiper heating, the energy consumption for heating that wiper is actually reduced to a minimum, which also affects the complexity of the electrical installation to operate.

Posebej stroškovno ugoden način uporabe pokritja se pokaže, kadar je prekrivni element izdelan kot celota, skupaj z samo metlico brisalca, ki se prilega na površino steklene površine. Ta oblika izvedbe se še posebej priporoča, če mora biti brisalec na osnovi drugih kriterijev brez nadaljnjega opremljen z vetrobransko letvico.A particularly advantageous use of the coating is shown when the overlay element is made as a whole, together with the wiper blade itself, which fits into the glass surface. This design is particularly recommended if the windscreen wiper is to be fitted without any further criteria on the basis of other criteria.

Na Sliki 1 je ena izvedba ogrevanega brisalca (20) za čiščenje vetrobranskih stekel pri vozilih po navedenem izumu v perspektivi v nepritisnjenemu stanju in z označeno iztegnjeno lego brisalca.In Figure 1, one embodiment of a heated windscreen wiper (20) for cleaning the windscreens of vehicles of the present invention is in perspective in the unpressed state and with the wiper position indicated.

Slika 2 prikazuje pravokotni prečni prerez vzdolžne linije A-A ogrevanega brisalca (20) s slike 1.Figure 2 shows a rectangular cross-section of the longitudinal line A-A of the heated wiper (20) of Figure 1.

Na Sliki 3 je upodobljen pravokotni presek ene izmed vzmeti nosilnega elementa, ki je uporabljena pri izvedbi, ki je upodobljena na sliki 2. Slika št. 3 nam prikazuje pravokotni prečni prerez že opisane vzmeti (26), ki je na enem robu odebeljena (28), njegova zunanja bočna ploskev pa je spremenjena v utor (38), ki je izdelan po meri ogrevalnega elementa (40), ki poteka po celotni dolžini vzmeti (26).Figure 3 depicts a rectangular cross section of one of the springs of a supporting element used in the embodiment depicted in Figure 2. Figure no. 3 shows a rectangular cross-section of the previously described spring (26) which is thickened at one edge (28) and its outer lateral surface is changed into a groove (38) which is custom-made for a heating element (40) extending along the entire length of the spring (26).

Na Sliki 4 in Sliki 5 sta prikazana še dve prednostni obliki prečnega preseka vzmeti (26) za izdelavo nosilnega elementa (10). Slika št. 4 nam prikaže izvedbo vzmeti (26), ki zaradi svoje oblike najbolj optimalno prenaša napetost vzmeti in prevodnost toplote, ki jo potrebujemo za prilagoditev in namestitev konice brisalne metlice na stekleno površino.In Fig. 4 and Fig. 5, two more preferred cross-sectional shapes of the spring (26) are shown for making the supporting element (10). Picture no. 4 shows us the design of the spring (26), which, due to its shape, most optimally conveys the spring tension and the heat conduction required to adjust and position the tip of the wiper blade on the glass surface.

Brisalec (20) s skice št.l sestavljata dve vzmeti (26), ki tvorita nosilni element (10). Nosilni element (19) je v neobremenjenem stanju upognjen v svoji vzdolžni smeri. Na konveksno upognjeni ploskvi, kije obrnjena stran od vetrobranskega stekla (12), ki ga želimo očistiti, oziroma na zunanji ploskvi nosilnega elementa (10) je na sredini nameščena priključna priprava (14), preko katere je brisalec ločljivo pripet s pogonsko brisalno ročico, kije pritrjena na pogonski mehanizem brisalcev motornega vozila. Na proti vetrobranskemu steklu obrnjeni, konkavno upognjeni ploskvi, oziroma na spodnji ploskvi nosilnega elementa (10), je nameščena podolgovata gumijasta brisalna metlica (16), ki se razteza po celotni dolžini, paralelno na nosilni element (10). Na koncih brisalca (20) so predvideni spojitveni deli, ki delujejo skupaj s priključno napravo brisalca (14) kot nekakšen zgibni del (18), kateri skrbi za homogenost celotne strukture. Sestava teh delov ni shematsko prikazana.The wiper (20) of the drawing No. 1 consists of two springs (26) which form the supporting element (10). The support element (19) is bent in its longitudinal direction in the unladen state. On the convexly bent surface facing away from the windscreen (12) to be cleaned, or on the outer surface of the support element (10), a connecting device (14) is mounted in the middle through which the wiper is detachably secured by a drive wiper arm, which is attached to the drive mechanism of a motor vehicle wiper. An elongated rubber wiper blade (16) extends along the windscreen, the concave-bent surface or the lower surface of the support element (10), extending along the entire length parallel to the support element (10). At the ends of the wiper (20) are provided coupling parts that act together with the wiper attachment device (14) as a kind of articulated part (18), which ensures homogeneity of the whole structure. The composition of these parts is not shown schematically.

Brisalec (20) je s pomočjo brisalnega vzvoda pritisnjen proti vetrobranskemu steklu, proti površini, ki jo želimo očistiti. Ta lega je prikazana s prekinjeno črto (12). Ker prekinjena črta predstavljala največjo ukrivljenost površine vetrobranskega stekla, je jasno razvidno, da je ukrivljenost še nepritisnjenega brisalca (20), ki s svojimi na vetrobranskem steklu ležečimi konci, večja od maksimalne ukrivljenosti vetrobranskega stekla. Nepritisnjen brisalec ima torej glede vetrobranskega stekla konkaven, vbokel položaj. Pod pritiskom (30) nosilne ročice se brisalec (20) s svojo, za brisanje prilagojeno brisalno metlico (16) prilagodi po celotni dolžini na površino vetrobranskega stekla (12) in preide v skoraj iztegnjeni delovni položaj (22). Pri tem se v vzmeteh nosilnega elementa (10) ustvari napetost, ki skrbi za popolno prilagoditev in namestitev brisalne metlice (16), oziroma njene konice (34), po njeni celotni dolžini, na vetrobransko steklo motornega vozila. Ker se sferno ukrivljeno vetrobransko steklo (12) in njegov radij neprestano spreminjata, se mora brisalec (20) v primerjavi z brisalno ročico, med svojim gibanjem pri brisanju stalno prilagajati vsakokratnemu položaju in obliki vetrobranskega stekla (12).The wiper (20) is pressed against the windscreen by the wiper lever against the surface to be cleaned. This position is indicated by the dashed line (12). Since the dashed line represented the greatest curvature of the windscreen surface, it is clear that the curvature of the not yet pressed wiper (20) with its ends resting on the windscreen is greater than the maximum curvature of the windscreen. The open wiper thus has a concave, concave position with respect to the windscreen. Under pressure (30) of the carrier arm, the wiper (20) adjusts with its erasure-adapted wiper blade (16) over the entire length to the surface of the windscreen (12) and moves to a nearly extended working position (22). In this case, a tension is created in the springs of the supporting element (10), which ensures the complete adjustment and installation of the wiper blade (16), or its tip (34), along its entire length, onto the windscreen of the motor vehicle. As the spherical curved windscreen (12) and its radius change constantly, the wiper (20) must constantly adjust to the windscreen position and shape (12) when compared to the wiper arm, relative to the wiper arm.

Na nasprotni strani brisalne konice (16), ki leži na vetrobranskem steklu (12) je nameščena gumijasta letev v obliki spojlerja (24), katera med vožnjo dodatno ustvarja pritisk na celotno strukturo brisalca (20). Gumijasti spojler (24) se razteza po celotni dolžini brisalca (20) in je na obeh koncih pokrit z zaključno kapico (18).On the opposite side of the wiper tip (16), which rests on the windshield (12), there is a spoiler-shaped rubber strip (24), which additionally puts pressure on the entire structure of the wiper (20) while driving. The rubber spoiler (24) extends along the entire length of the wiper (20) and is covered by a cap (18) at both ends.

Brisalec (20) ima brisalno metlico (16), ki ima na nasprotnih straneh vzdolžna žlebova (32), katera potekata na isti višinski ravnini. V vsakem izmed žlebov (32) je nameščena po ena vzmet (26), oba pa sestavljata nosilni element (10), kateri je pokrit z gumijastim βThe wiper (20) has a wiper blade (16) having longitudinal grooves (32) on opposite sides extending on the same height plane. One spring (26) is provided in each of the grooves (32), both of which comprise a support element (10) covered by a rubber β

spojlerjem (24) in le ta ni deljen z spodnjim delom, ki opravlja funkcijo brisanja vetrobranskega stekla.the spoiler (24), which is not divided by the lower part, which performs the function of wiping the windscreen.

V smeri proti steklu je (12) je metlica ustvarjena z dvema kanaloma (36), katera omogočata da se konica metlice (34) lahko nagne v vlečni položaj smeri brisanja brisalca (20).In the direction of the glass (12), the broom is created with two grooves (36) that allow the tip of the broom (34) to be tilted to the pulling position of the wiper wiper direction (20).

Kot je prikazano na sliki št.2, je v notranjosti obeh vzmeti (26), ki sta temu primemo oblikovana, vsakokrat nameščen po en ogrevalni element (40). Vzmeti (26) imata pri prikazani izvedbi na notranji strani odebelitev (28) in imata viličasto obliko. Oba prikazana ogrevalna elementa (40) sta na koncih brisalca zankasto povezana in spojena. Vzmeti (26), ki sestavljata nosilni element (10), morata biti sestavljeni tako, da ogrevani stranici ležita čelno obrnjeni, ena proti drugi. Pri taki sestavi ima ogrevalni element (40), ki sestoji iz lakiranega električno uporovnega materiala, direkten stik z vzmetema (26), saj se temperatura ogrevalnega elementa z njegove celotne površine direktno prenaša na celoten brisalec (20). Za še hitrejše prevajanje toplote z grelnega elementa (40), na celotno strukturo brisalca (20), je ugodno, da je utor, kjer je le ta nameščen, zalit z fleksibilnim, toplotno prevodnim in električno neprevodnim materialom. S tem je zagotovljena odličen toplotni tok med ogrevalnima elementoma (40), in posledično nosilnim elementom (10) in konico metlice brisalca (16), kar je bistveno za udobno in varno vožnjo.As shown in Fig. 2, one heating element (40) is each housed inside the two springs (26), which are suitably formed therefrom. In the embodiment shown, the springs (26) are thickened (28) on the inside and have a forked shape. The two heating elements (40) shown are looped and connected at the ends of the wiper. The springs (26) that make up the support element (10) must be assembled so that the heated sides are facing the other side. In such an assembly, the heating element (40) consisting of a varnished electrically resistive material has direct contact with the springs (26), since the temperature of the heating element is directly transmitted from its entire surface to the entire wiper (20). For even faster transfer of heat from the heating element (40) to the entire structure of the wiper (20), it is advantageous for the groove where it is located to be sealed with flexible, thermally conductive and electrically conductive material. This ensures excellent heat flow between the heating elements (40) and, consequently, the supporting element (10) and the tip of the wiper blade (16), which is essential for comfortable and safe driving.

Prednostno je ogrevalni element (40) sestavljen iz lakirane nerjavne uporovne žice tipa: FeCrAl, NiCr, NiCrFe, NiFe, oziroma iz v ta namen poznanih materialov. Debelina ogrevalnega elementa in dolžina ogrevane površine pa se določi na podlagi izračuna potrebne energije za uspešno ogrevanje celotnega brisalca (20).Preferably, the heating element (40) consists of a varnished stainless resistive wire of the type: FeCrAl, NiCr, NiCrFe, NiFe, or materials known for this purpose. The thickness of the heating element and the length of the heated surface are determined on the basis of a calculation of the energy required to successfully heat the entire wiper (20).

S takim načinom ogrevanja se ogrevalni elementi (40) najbolj približajo zmrznjeni vodi, ki se nabira prečnih žlebovih (32, 36) brisalne metlice (16) in zato tudi v hladnih zimskih časih omogočajo relativno gibanje, med nosilnim elementom (10) in brisalno metlico, posledično pa to prispeva k nemotenemu prilagajanju metlice sferno.With this type of heating, the heating elements (40) are closest to the frozen water, which collects the transverse grooves (32, 36) of the wiper blade (16) and thus, in cold winter conditions, allows for relative movement between the support element (10) and the wiper blade and, as a consequence, it contributes to the smooth adjustment of the spherical ball.

Claims

A heated windscreen wiper (20) for vehicle windscreens having an elongated, flexible, bent and bent support element (10) consisting of a pair of springs (26) along its faces on the convex side of the support element (19), this is a concave surface, a rubber wiper blade (16) is mounted in the direction of the windscreen, and a rubber wiper blade (16) has one longitudinal groove (32) for each spring (26) of the support element (10) on each longitudinal side. in that the heating element (40) of electrically resistive material is positioned along the entire length of the inside of the spring (26) of the supporting element (10).

A heated windscreen wiper (20) for vehicles according to claim 1, characterized in that the spring (26) is thickened along one edge and has a rectangular cross-section with a forked shape.