Windscreen wiper device, in particular for a motor vehicle

Abstract

A windshield wiper device (10), in particular for a motor vehicle, is disclosed, comprising a wiping element (18) movable over a windshield (12) to be wiped. According to the invention, a compressed gas generator (14) generating compressed gas is provided, and the wiping element (18) is designed to sweep over the windshield (12) without contact.

Description

State of the art

[0001] The invention relates to a windscreen wiper device according to the class of the independent claim.

[0002] Some windscreen wiper devices with a wiping element are already known.

[0003] For example, DE102 50 322 A1 shows a windshield wiper device comprising a wiping element. DISCLOSURE OF THE INVENTIONAdvantages of the invention

[0004] The windshield wiper device according to the invention with the features of the main claim has the advantage that a compressed gas generator is provided, and the wiping element is designed to sweep over the windshield without contact. This achieves a good wiping result, while the wiping element does not wear out.

[0005] The measures listed in the subclaims also result in advantageous developments and improvements of the features specified in the main claim.

[0006] An advantageously particularly good wiping result is achieved if the wiping element has a plurality of nozzles for the discharge of the compressed gas.

[0007] It is particularly advantageous if the nozzles are arranged regularly along the length of the wiping element. This is particularly easy to manufacture and delivers a good wiping result.

[0008] It is particularly advantageous if the density of the nozzles in the area of ​​a sensor device is higher along the longitudinal extent than in the remaining area of ​​the wiping element, since a particularly good wiping result is then achieved in the area of ​​the sensor device.

[0009] An advantageously good wiping result is achieved by arranging the nozzles at an angle with respect to a perpendicular to the window.

[0010] Compressed air is used as a simple, cost-effective and therefore advantageous compressed gas.

[0011] Particularly good cleaning effect is advantageously characterized by the fact that a cleaning agent is added to the compressed gas. Description of the drawings

[0012] An embodiment of the invention is illustrated in the drawings and explained in more detail in the following description. They show: Fig. 1 a windscreen wiper device according to the invention in a schematic representation, Fig. 2 a cross section through a wiping element of a windscreen wiper device according to the invention in a schematic representation and Fig. 3 a schematic side view of a wiping element. Description of the embodiments

[0013] Fig. Figure 1 shows a schematic representation of a windshield wiper device 10 according to the invention. This wipes a window 12, in particular a windshield of a motor vehicle.

[0014] The windscreen wiper device 10 according to the invention comprises a compressed gas generator 14, which is designed as a compressor for air.

[0015] In addition, the windscreen wiper device 10 according to the invention comprises a drive unit 16 and a wiping element 18 which is guided over the windscreen 12 during operation.

[0016] The wiping element 18 oscillates back and forth between a lower reversal position 20 and an upper reversal position 22. In a variation of the invention, however, the wiping element 18 can also be guided linearly over the pane 12.

[0017] The wiping element 18 is also connected to the compressed gas generator 14. The compressed gas generator 14 generates compressed air, which is fed via corresponding hose lines to the wiping element 18 and there from nozzles 24 ( Fig. 2) exits.

[0018] As shown here, a further wiping element 26 can also be provided, which is also connected to the compressed gas generator 14. The further wiping element 26 can be set in motion by a further drive unit 28 or can also be connected to the drive unit 16 so that it is set in motion by the drive unit.

[0019] In Fig. 2 shows a cross section through a wiping element 18 of a windscreen wiper device 10 according to the invention, as well as a windscreen 12 in a schematic representation.

[0020] The wiping element 18 comprises a guide bar 30, which serves as a channel for the compressed air from the compressed gas generator 14. A plurality of nozzles 32 are arranged on the guide bar 30, which direct the compressed gas or compressed air toward the window 12.

[0021] The nozzles 32 are arranged at an angle with respect to an imaginary vertical line S, so that the compressed air flow (flow arrow 34) flowing from the nozzles 32 also hits the pane 12 at an angle and blows away any rain and dirt particles 36 present.

[0022] The guide bar 30 is guided at a slight distance above the pane 12 and does not touch it. The guide bar 30 is therefore guided over the pane 12 without contact.

[0023] As shown here, the nozzles 32 can be arranged opposite one another.

[0024] In a simple embodiment, the guide rail 30 is made of plastic. The valves 32 can also be made of plastic and, for example, be provided integrally with the guide rail 30. In a variation of the invention, however, the valves 32 can also be made of metal.

[0025] In addition to the compressed air, a cleaning agent can also be added. This can, for example, be mixed with the compressed air in a mist-like manner.

[0026] In a variation of the invention, however, cleaning fluid can also be briefly applied to the disc 12 through the nozzles 32, which is also guided to the nozzles 32 by the guide strip 30.

[0027] In Fig. 3 a wiping element 18 is shown in a schematic side view.

[0028] The guide rail 30 supports the nozzles 32. A sensor device 38, particularly an optical one, is also arranged on the windshield 12. This is designed as a camera that monitors the surroundings in front of the vehicle. In a variation, a lidar camera can also be used as the sensor device 38.

[0029] The individual nozzles 32 each have a standard spacing A1 along the longitudinal extent L. Adjacent nozzles 32 are thus arranged equidistantly. In the area of ​​the sensor device 38, the nozzles 32 have a nozzle spacing A2 along the longitudinal extent L that is smaller than the standard spacing A1. This increases the density of the nozzles 32, which in particular improves cleaning performance in the area of ​​the sensor device 38. In the area of ​​the guide strip 30 that sweeps over the sensor device 38, a smaller spacing is provided between the individual nozzles 32, since the nozzle spacing A2 is smaller than the standard spacing A1.

[0030] In this view, the nozzles 32 are only visible from one side. The nozzles 32 can also be arranged on one side only or, as in Fig. 2, be arranged on both sides of the guide rail 30.

[0031] The nozzles 32 can be arranged offset on both sides, so that one nozzle 32 on one side is arranged between two nozzles 32 on the other side. In a further variation, the nozzles 32 can generally be arranged on one side, but can be arranged on two sides in the area of ​​the sensor device 38, i.e., in the area of ​​the guide bar 30 that sweeps over the sensor device 38.

[0032] In addition, guide elements, in particular sliding or rolling elements, can be arranged on the guide rail 30, in particular in the region of the ends with respect to the longitudinal extent L, which ensure the distance between the guide rail 30 and the disc 12. QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] DE 102 50 322 A1

[0003]

Claims

[1] Windscreen wiper device (10), in particular for a motor vehicle, comprising a wiping element (18) movable over a windscreen (12) to be wiped, characterized by that a compressed gas generator (14) which generates compressed gas is provided and the wiping element (18) is designed to sweep over the pane (12) without contact. [2] Windscreen wiper device (10) according to claim 1, characterized by that the wiping element (18) has a plurality of nozzles (32) for the discharge of the compressed gas. [3] Windscreen wiper device (10) according to claim 2, characterized by that the nozzles (32) are arranged regularly along the longitudinal extent (L) of the wiping element (18). [4] Windscreen wiper device (10) according to claim 2 and / or 3, characterized by that along the longitudinal extent (L) the density of the nozzles (32) in the area of ​​a sensor device (38) is higher than in the remaining area of ​​the wiping element (18). [5] Windscreen wiper device (10) according to one of claims 2 to 4, characterized by that the nozzles (32) are arranged at an angle with respect to a perpendicular (S) to the disc (12). [6] Windscreen wiper device (10) according to one of the preceding claims, characterized by that the compressed gas is compressed air. [7] Windscreen wiper device (10) according to one of the preceding claims, characterized by that the cleaning agent or cleaning fluid is added to the compressed gas.

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