GB2227649A - Windscreen wiper blade element - Google Patents

Windscreen wiper blade element Download PDF

Info

Publication number
GB2227649A
GB2227649A GB9002014A GB9002014A GB2227649A GB 2227649 A GB2227649 A GB 2227649A GB 9002014 A GB9002014 A GB 9002014A GB 9002014 A GB9002014 A GB 9002014A GB 2227649 A GB2227649 A GB 2227649A
Authority
GB
United Kingdom
Prior art keywords
windscreen wiper
wiper blade
wiper device
windscreen
wiping lip
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB9002014A
Other versions
GB2227649B (en
GB9002014D0 (en
Inventor
Gunter Gmeiner
Rudolf Andres
Heinz W Knoll
Volker Petri
Harald Pfistner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daimler Benz AG
Original Assignee
Daimler Benz AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Daimler Benz AG filed Critical Daimler Benz AG
Publication of GB9002014D0 publication Critical patent/GB9002014D0/en
Publication of GB2227649A publication Critical patent/GB2227649A/en
Application granted granted Critical
Publication of GB2227649B publication Critical patent/GB2227649B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/04—Wipers or the like, e.g. scrapers
    • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
    • B60S1/38—Wiper blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/04—Wipers or the like, e.g. scrapers
    • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
    • B60S1/38—Wiper blades
    • B60S1/3803—Wiper blades heated wiper blades
    • B60S1/3805—Wiper blades heated wiper blades electrically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/04—Wipers or the like, e.g. scrapers
    • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
    • B60S1/38—Wiper blades
    • B60S2001/3827—Wiper blades characterised by the squeegee or blade rubber or wiping element
    • B60S2001/3836—Wiper blades characterised by the squeegee or blade rubber or wiping element characterised by cross-sectional shape

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Body Structure For Vehicles (AREA)
  • Cleaning In General (AREA)
  • Pivots And Pivotal Connections (AREA)

Description

0 t :22 2:2 o7 E-, __1 Windscreen wiper device The invention relates to
a-windscreen wiper device having at least one windscreen wiper, which has a wiper blade adapted to be mounted on a driven wiping arm, and having a retaining body on which a wiping lip, adapted to rest on an outer surface of the windscreen, is pivotally arranged.
In the case of known windscreen wiper devices of this type, which are used in particular on motor vehicles, a wiping arm of a windscreen wiper is fastened on a driven wiper shaft. At the free end of the wiping arm, a retaining clip, on which the wiper blade of the windscreen wiper is fastened, is hinged. The wiper blade has a retaining body, which is fastened to the retaining clip. Arranged on the retaining body, by means of a connecting piece, is a wiping lip of the wiper blade. The centrally arranged connecting piece permits a swivelling movement of the wiping lip with respect to the vertical axis of the wiper blade. Depending on the wiping direction of the windscreen wiper, the wiping lip consequently assumes various swivelled positions.
In order to avoid the wiper blade freezing to the windscreen in cold weather, windscreen wiper devices are known in which a heating device is provided on the wiper blade.
German Offenlegungsschrift 3,134,083 discloses a windscreen wiper device in which channels for a heating medium are provided on the wiper blade. These heating medium channels are connected to a compressed-air or pressure-fluid source with a heating device.
German Utility Model 1,989,712 discloses a windscreen wiper device having a wiper blade which is provided with a battery-operated heating element. In one embodiment, the heating element is arranged in the region 2 of the connecting piece on wiper blade.
Another windscreen wiper device according to German Auslegeschrift 2,309, 902 describes a wiper blade on which the leaf springs arranged on the retaining body are used as heating elements. The heating effect of the heating elements is achieved by the resistance of the leaf springs to an electric current.
In the case of the windscreen wiper devices known in the prior art, although the swivel-moveably arranged wiping lip of the wiper blade can be heated, it cannot be adapted specifically to the various operating conditions of the windscreen wiper device. As a result, the cleaning performance of the windscreen wiper device is impaired.
The present invention seeks to provide a windscreen wiper device in which an adaptation of the wiping lip to various operating conditions of the windscreen wiper device is possible.
According to the present i provided a windscreen wiper device, having at least one windscreen wiper, which has a wiper blade adapted to be mounted on a driven wiping arm, and having a retaining body on which a wiping lip, adapted to rest on an outer surface of the windscreen, is pivotally arranged, wherein means by which pivoted positions of the wiping lip in relation to the retaining body can be achieved are arranged on the wiper blade.
The means arranged on the retaining body of the nvention there is the. wiper blade permit a specific influence to be brought to bear on the swivelled position of the wiping lip in relation to the retaining body. The major advantage of the new windscreen wiper device is the improvement in the cleaning effect at high travelling speeds. With the means arranged on the wiper blade, the wiping lip can be fixed in such a way that a stiffening of the wiper blade is achieved. The flow around the wiper blade ca n be optimized under increasing wiping frequency by the wiping lip assuming different j tl.
3 swivelled positions in relation to the vertical axis of the wiper blade, depending on the wiping direction. Furthermore, smearing after the wiper blade can be reduced by setting the swivelled position of the wiping lip. Finally, the service life of the wiper blade can be increased by keeping the wiping lip in a defined position when the windscreen wiper device is in the rest position.
An advantageous development of the invention provides for the means to be arranged in the region of a connecting piece provided centrally between the retaining body and the wiping lip.
An advantageous embodiment provides for a hollow body, the volume of which can be changed by a change in its internal pressure, to be arranged between the wiping lip and the retaining body. The hollow body, which is preferably closed at its one front end and is connected at its other front end to a unit generating positive pressure or negative pressure, brings about a swivelling movement of the wiping lip, which is dependent on the change in volume of the hollow body.
In the case of large wiper blades in particular, it may be advantageous if a hollow body is provided in each case on the two longitudinal edges of the connecting piece.
The production of the wiper blade becomes particularly simple if the hollow bodies are integral with the wiper blade.
An advantageous further development provides for the hollow bodies to be designed with bellows-like side walls. The bellows-like side walls are designed so as to be distinctly less stiff than the centrally arranged connecting piece.
Another embodiment of the invention provides for an induction coil, arranged on a wiper blade part, to be provided in the region of the connecting piece, which coil interacts with a metal pole arranged on the opposite wiper blade part. If a current flows through the induction coil, the opposite metal pole is attracted by the 4 magnetic effect brought about. This brings about a swivelling movement of the wiping lip. Instead of the metal pole, magnetizable particles, which are already incorporated in the rubber blend of the wiper blade, mayalso act. Similarly, it may be provided that the induction coil interacts with an opposite field pole, which is designed as a permanent magnet.
An advantageous further development provides for an arrangement of induction coil and metal pole to be provided in each case in the region of both longitudinal edges of the connecting piece. This is of advantage in particular in the case of large wiper blades.
A further advantage of the arrangement of induction coil and metal pole provided on the wiper blade is that a heating effect of the wiper blade can be produced by means of an increased flow of current. In this case, such a design is possible in which a heating current with an increased frequency is superimposed on a signal for changing the swivelled position of the wiping lip. As a consequence of this measure, an "increased heating effect" of the wiper blade is controllable.
Two embodiments of the invention will now be described by way of example with reference to the drawings, in which:
Fig. 1 shows a diagrammatic section through a wiper blade of a first embodiment of the invention and Fig. 2 shows a section according to Fig. 1 of another embodiment of the invention.
The wiper blade (1), shown in Fig. 1, of.a windscreen wiper device (not shown) is fastened on a retaining clip (2) which is fastened swivelmoveably on a wiper arm (not shown). For this purpose, reliefs (3a, 3b), into which the retaining clip (2) engages, are provided on a retaining body (3) of the wiper blade (1). Arranged centrally on the retaining body (3) is a connecting piece (4), which connects the retaining body (3) to a wiping lip (5). The wiping lip (5) has a wiping edge (6), which rests on a windscreen (7) to be cleaned.
A -1 X, Arranged in the region of the connecting piece (4) are hollow bodies (8, g), which are provided on both sides of the connecting piece (4). The hollow bodies (8, 9) extend over the entire length (running perpendicularly to the plane of the drawing) of the wiper blade (1).
Bellows-like side walls (8a, 9a) are provided on the sides of the hollow bodies (8, 9) opposite the connecting piece (4). While the one front end of the hollow bodies (8, 9) is closed, a unit with which the internal pressure of the hollow bodies (8, 9) can be changed is arranged on the other front end. This unit (not shown in the drawing) may be a pressure or negative-pressure source. A change in the internal pressure of the hollow bodies (8, 9) also brings about their change in volume. If, for example, the internal pressure of the hollow body (8) is increased, the wiping lip (5) executes a swivelling movement counterclockwise and assumes a position (14) which is drawn in by broken lines. The wiping lip (5) consequently assumes a swivelling angle (11) in relation to the vertical axis (10) of the wiper blade (1). In the same way, by impinging the hollow body (9), the wiping lip (5) can be brought into a swivelled position (12) in which the wiping lip (5) assumes a swivelling angle (13) in relation to the vertical axis (10).
The impingement of the hollow bodies (8, 9) is performed dependently on the respective operating conditions of the windscreen wiper device. With increasing travelling speed, for example an increase in pressure in both hollow bodies (8, 9) can cause. the wiper blade (1) as a whole to be stiffened. ' Depending on the wiping direction of the windscreen wiper, the hollow bodies (81 9) can be impinged alternately. The frequency of the change in pressure in the hollow bodies (8, 9) can be performed in a simple way with a simple microcomputer system, the boundary conditions being specified. The adaptation of the swivelling angle (11, 13) to the respective operating conditions of the windscreen wiper device has the effect of achieving 1.1 k.
6 an improved cleaning performance of the wiper blade (1). In particular, the flow around the wiper blade (1) can be optimized. Furthermore, a possible smearing after the wiper blade (1) can be reduced.
In the rest position of the windscreen wiper device, the wiping lip (5) can be positioned by the hollow bodies (8, 9) in such a way that no premature wear effects or damage to the wiping edge (6) occur.
The wiper blade (15) shown in Fig. 2 has a retaining body (16), on which reliefs (16a, 16b), into which a retaining clip (17) engages, are provided. The retaining body (16) is connected via a centrally arranged connecting piece (18) to a wiping lip (18), on which a wiping edge (20) is formed. The wiping edge (20) rests on a windscreen (21) to be cleaned. Reliefs (31, 32) in the form of interstices of approximately triangular cross-section are provided laterally in the region of the connecting piece (18). Induction coils (22, 23), which are connected to a power supply unit (not shown in the drawing), are arranged on the upper wiper blade part, facing the retaining body (16). Arranged opposite the induction coils (22, 23) on the wiper blade part respec tively facing the wiping lip (19) are metal poles (24, 25), which interac t with the induction coils (22, 23).
If, for example, current flows through the induction coil (22), its magnetic effect generates a force of attraction on the metal pole (24) arranged on the wiping lip (19).
This brings about a swivelling movement of the wiping lip (19) from the vertical position (2.6) into the position (27) shown in Fig. 2. The wiping lip (19) consequently swivels about a swivel axis, which lies approximately in the centre of the connecting piece (18) and covers a swivelling angle (28) in relation to the vertical posi tion (26). In the same way, the arrangement (23, 25) brings about a swivelling movement of the wiping lip (19) into a swivelling position (29) in which the wiping lip (19) is swivelled through a swivelling angle (30) in relation to the vertical position (26).
p 4 7 The metal poles (24, 25) may also be designed as magnetizable particles, which are incorporated in the wiping lip (19) in the region of the connecting piece (18). The operating principle of the embodiment of Fig. 2 may correspond to that of Fig. 1.
If k_ 8

Claims (9)

Claims
1. A windscreen wiper device, having at least one windscreen wiper, which has a wiper blade adapted to be mounted on a driven wiping arm, and having a retaining body on which a wiping lip, adapted to rest on an outer surface of the windscreen, is pivotally arranged, wherein means by which pivoted positions of the wiping lip in relation to the retaining body can be achieved are arranged on the wiper blade.
2. A windscreen wiper device according to Claim 1, wherein the means are arranged in the region of a connecting piece provided centrally between the retaining body and the wiping lip.
3. A windscreen wiper device according to Claim 1 or 2, wherein at least one hollow body, the volume of which is variable by a change in its internal pressure, is arranged between the wiping lip and the retaining body.
4. A windscreen wiper device according to Claim 3, wherein a hollow body is provided in each case on the two longitudinal edges of the connecting piece.
5. A windscreen wiper device according to Claim 3 or 4, wherein the hollow bodies are integral with the wiper blade.
6. A windscreen wiper device according to any one of Claims 3 to 5, wherein the hollow bodies have bellowslike side walls.
7. A windscreen wiper device according to Claims 1 and 2, wherein at least one lateral relief in the form of an interstice is provided in the region of the connecting piece and an induction coil to which current can be f X_ 9 applied, is arranged on a wiper blade part bounding the relief, which coil interacts with a metal pole arranged on an opposite wiper blade part.
1
8. A windscreen wiper device according to Claim 7, wherein an arrangement of induction coil and metal pole is provided on each longitudinal edge of the connecting piece.
9. A windscreen wiper device, having at least one windscreen wiper, substantially as described herein with reference to, and as illustrated in, the accompanying drawings.
r Published 1990 at The Patent Office, State House.66 71 High Holborn, London WC1R4TP.Purther copies maybe obtalnedfrom ThePatentOfIlce. Sales Branch, St Mary Cray, Orpington, Kent BR5 3RD. Printed by Multiplex techniques ltd, St Mary Cray, Rent, Con. 1187
GB9002014A 1989-02-04 1990-01-30 Windscreen wiper device Expired - Fee Related GB2227649B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19893903305 DE3903305A1 (en) 1989-02-04 1989-02-04 WINDOW WIPER

Publications (3)

Publication Number Publication Date
GB9002014D0 GB9002014D0 (en) 1990-03-28
GB2227649A true GB2227649A (en) 1990-08-08
GB2227649B GB2227649B (en) 1993-02-10

Family

ID=6373409

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9002014A Expired - Fee Related GB2227649B (en) 1989-02-04 1990-01-30 Windscreen wiper device

Country Status (3)

Country Link
DE (1) DE3903305A1 (en)
FR (1) FR2642716B1 (en)
GB (1) GB2227649B (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0506541A1 (en) * 1991-03-29 1992-09-30 Valeo Systemes D'essuyage Wiper rubber for wiper blade, in particular for motor vehicles
FR2703966A1 (en) * 1993-04-16 1994-10-21 Valeo Systemes Dessuyage Wiper blade.
FR2706397A1 (en) * 1993-06-16 1994-12-23 Gec Alsthom Transport Sa Windscreen wiper blade, especially for a high-speed vehicle
US5376079A (en) * 1991-09-30 1994-12-27 Holm; Niels E. Dispensing device for dispensing at least two fluids
GB2287179A (en) * 1994-03-11 1995-09-13 Nissan Motor Wiper for motor vehicles
WO1999019185A1 (en) * 1997-10-11 1999-04-22 Robert Bosch Gmbh Wiper blade rubber element
FR2963765A1 (en) * 2010-08-10 2012-02-17 Peugeot Citroen Automobiles Sa Windscreen wiper installation for motor vehicle, has piezo sensor element whose output signal is guided to electronic stage that comprises servo system for actuating another piezo actuator element
US8389910B2 (en) * 2006-08-09 2013-03-05 Tsi Technologies Llc Inductively heated windshield wiper assembly

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0869042A1 (en) 1997-04-03 1998-10-07 Volkswagen Aktiengesellschaft Wiper apparatus
DE10039290B4 (en) * 2000-08-11 2013-01-31 Valeo Auto-Electric Wischer Und Motoren Gmbh wiper device
FR2869278B1 (en) * 2004-04-27 2006-08-04 Peugeot Citroen Automobiles Sa WIPER STICK FOR MOTOR VEHICLE WIPER BLADE
DE102006057231A1 (en) 2006-12-05 2008-06-12 Volkswagen Ag rubber wiper
DE102009003102A1 (en) * 2009-05-14 2010-11-18 Robert Bosch Gmbh Wiper blade for windscreen wiper of motor vehicle, has base body flexibly connected with lip, and electro-magnetic systems variably adjusting angles between base body and lip, where magnetic systems include electro-magnetic arrangements

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1023024A (en) * 1950-08-04 1953-03-12 Wiper blade refinements
FR1298183A (en) * 1961-08-22 1962-07-06 Tridon Mfg Ltd Windshield wiper device magnetically applied to the windshield
DE1989712U (en) * 1968-02-20 1968-07-18 Heinz Kern WIPER FOR VEHICLES.
DE2309902C3 (en) * 1973-02-28 1981-04-23 Klaus 8580 Bayreuth Linhardt Electrically heated wiper blade for car windshield wipers
DE2725405A1 (en) * 1977-06-04 1978-12-14 Egon Gelhard Windscreen wiper blade - has foam strip pressable against surface by pressurised cleaning fluid fed to integral chamber
DE3134083A1 (en) * 1981-08-28 1983-03-10 Wolfram 7891 Berau Paulus Device for the cleaning and/or deicing of outside windows, in particular for motor vehicles
EP0320206A1 (en) * 1987-12-08 1989-06-14 Nippon Wiper Blade Co., Ltd. Blade rubber of windshield wiper
FR2628047B1 (en) * 1988-03-02 1991-02-15 Journee Paul Sa DOUBLE CHANNEL SQUEEGEE FOR WIPER BLADE

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0506541A1 (en) * 1991-03-29 1992-09-30 Valeo Systemes D'essuyage Wiper rubber for wiper blade, in particular for motor vehicles
FR2674488A1 (en) * 1991-03-29 1992-10-02 Valeo Systemes Dessuyage WIPER BLADE FOR WIPER BLADE, ESPECIALLY A MOTOR VEHICLE.
US5376079A (en) * 1991-09-30 1994-12-27 Holm; Niels E. Dispensing device for dispensing at least two fluids
US5520658A (en) * 1991-09-30 1996-05-28 E. R. Squibb & Sons, Inc. Dispensing device for dispensing at least two fluids
FR2703966A1 (en) * 1993-04-16 1994-10-21 Valeo Systemes Dessuyage Wiper blade.
FR2706397A1 (en) * 1993-06-16 1994-12-23 Gec Alsthom Transport Sa Windscreen wiper blade, especially for a high-speed vehicle
GB2287179A (en) * 1994-03-11 1995-09-13 Nissan Motor Wiper for motor vehicles
GB2287179B (en) * 1994-03-11 1997-10-22 Nissan Motor Wiper for wiping window glass of automotive vehicles
WO1999019185A1 (en) * 1997-10-11 1999-04-22 Robert Bosch Gmbh Wiper blade rubber element
US6216311B1 (en) * 1997-10-11 2001-04-17 Robert Bosch Gmbh Wiper blade rubber element
US8389910B2 (en) * 2006-08-09 2013-03-05 Tsi Technologies Llc Inductively heated windshield wiper assembly
FR2963765A1 (en) * 2010-08-10 2012-02-17 Peugeot Citroen Automobiles Sa Windscreen wiper installation for motor vehicle, has piezo sensor element whose output signal is guided to electronic stage that comprises servo system for actuating another piezo actuator element

Also Published As

Publication number Publication date
FR2642716B1 (en) 1994-09-23
DE3903305A1 (en) 1990-08-09
GB2227649B (en) 1993-02-10
FR2642716A1 (en) 1990-08-10
GB9002014D0 (en) 1990-03-28
DE3903305C2 (en) 1993-05-27

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Legal Events

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PCNP Patent ceased through non-payment of renewal fee

Effective date: 19970130