Windscreen wiper device, in particular for motor vehicle

Abstract

The invention relates to a windscreen wiper device (10), in particular for a motor vehicle, comprising a wiper element (18) which can be moved over a windscreen (12) to be wiped. According to the invention, a pressurized gas generator (14) which generates pressurized gas is provided, and the wiper element (18) is designed to sweep over the window panel (12) without contact.

Description

Field of the Invention

[0001] The present invention relates to a window pane wiper device of the type described in the independent claims. Background Art

[0002] Some window pane wiper devices with wiper elements are known.

[0003] For example, DE10250322 A1 describes a window pane wiper device including a wiper element. Summary of the Invention

[0004] The window pane wiper device according to the invention and having the features of the independent claims has the advantage that a pressure gas generator for generating pressure gas is provided, and the wiper element is configured to pass over the window pane without contact. Thus, good wiping results are obtained, and the wiper element is not worn.

[0005] Furthermore, by the measures recited in the dependent claims, advantageous developments and improvements of the features described in the independent claims are produced.

[0006] Particularly good wiping results are advantageously obtained if the wiper element has a plurality of nozzles for discharging pressure air.

[0007] Herein, it is particularly advantageous that the nozzles are arranged regularly along the longitudinal extension of the wiper element. This is particularly simple in manufacture and provides good wiping results.

[0008] Particularly advantageously, the density of the nozzles along the longitudinal extension is higher in the region of the sensor mechanism than in the remaining region of the wiper element, because particularly good wiping results are then obtained in the region of the sensor mechanism.

[0009] Advantageously good wiping results are obtained by arranging the nozzles at an angle with respect to the perpendicular to the window pane.

[0010] It is easy, inexpensive and thus advantageous to use pressure air as the pressure gas.

[0011] The feature of a particularly good cleaning effect advantageously lies in adding a cleaning agent to the pressure gas. Brief Description of the Drawings

[0012] An embodiment of the present invention is shown in the drawings and will be explained in detail in the following description. Among them:

[0013] Figure 1 The window pane wiper device according to the invention is schematically shown;

[0014] Figure 2The cross section of the wiper element of the window pane wiper device according to the invention is shown schematically; and

[0015] Figure 3 A schematic side view of the wiper element is shown. Detailed Description

[0016] Figure 1 The window pane wiper device 10 according to the invention is shown schematically. The window pane wiper device wipes a window pane 12, in particular the windshield of a motor vehicle.

[0017] The window pane wiper device 10 according to the invention includes a pressure gas generator 14, which is configured as a compressor for air.

[0018] Furthermore, the window pane wiper device 10 according to the invention includes a drive unit 16 and a wiper element 18 guided on the window pane 12 during operation.

[0019] The wiper element 18 oscillates back and forth between a lower reversal position 20 and an upper reversal position 22. However, in a variant of the invention, the wiper element 18 can also be guided linearly on the window pane 12.

[0020] Furthermore, the wiper element 18 is connected to the pressure gas generator 14. The pressure gas generator 14 generates pressurized air, which is guided through a corresponding hose to the wiper element 18 and ejected therefrom through nozzles 24( Figure 2 ).

[0021] As shown here, it is also possible to provide another wiper element 26, which is likewise connected to the pressure gas generator 14. This other wiper element 26 can be set in motion by another drive unit 28 or is likewise connected to the drive unit 16 such that it is set in motion by this drive unit.

[0022] In Figure 2 the cross section of the wiper element 18 of the window pane wiper device 18 according to the invention and the window pane 12 is shown schematically.

[0023] The wiper element 18 includes a guide strip 30, which serves as a passage for the pressurized air of the pressure gas generator 14. A plurality of nozzles 32 are arranged on the guide strip 30, which direct the pressurized gas or pressurized air in the direction of the window pane 12.

[0024] The nozzles 32 are arranged at an angle with respect to an imaginary vertical line S such that the pressurized air flow (flow arrow 34) flowing out of the nozzles 32 also impinges obliquely on the window pane 12 and blows away the existing rain and dirt particles 36.

[0025] The guide bar 30 is guided on the window pane 12 with a slight spacing here and does not contact it. The guide bar 30 is thus guided on the window pane 12 without contact.

[0026] As shown here, the nozzles 32 can be arranged opposite each other respectively.

[0027] In a simple configuration, the guide bar 30 is made of plastic. The valve 32 can also be made of plastic and is provided integrally with the guide bar 30, for example. However, in a variant of the present invention, the valve 32 can also be made of metal.

[0028] In addition to the compressed air, a cleaning agent can also be conveyed. This can be mixed with the compressed air in a foggy state, for example.

[0029] However, in a variant of the present invention, the cleaning liquid can also be applied to the window pane 12 through the nozzles 32 for a short time, and the cleaning liquid is also guided to the nozzles 32 through the guide bar 30.

[0030] In Figure 3 a schematic side view shows the wiper element 18.

[0031] The guide bar 30 carries the nozzles 32. Here, an especially optical sensor mechanism 38 is also arranged on the window pane 12. The optical sensor mechanism is configured as a camera, and the camera observes the environment in front of the vehicle. In a variant, a lidar camera can also be used as the sensor mechanism 38 here.

[0032] Each nozzle 32 has a normal spacing A1 along the longitudinal extension L respectively. The adjacent nozzles 32 are thus arranged at equal intervals. In the region of the sensor mechanism 38, the nozzles 32 have a nozzle spacing A2 that is smaller than the normal spacing A1 along the longitudinal extension L. Thereby, the density of the nozzles 32 is increased, and thereby an improved cleaning efficiency is obtained especially in the region of the sensor mechanism 38. Therefore, in the region of the guide bar 30 that sweeps across the sensor mechanism 38, a smaller spacing between the respective nozzles 32 is provided because the nozzle spacing A2 is smaller than the normal spacing A1.

[0033] The nozzles 32 can only be seen from one side in this view. The nozzles 32 can also be arranged unilaterally here or arranged on both sides of the guide bar 30 as shown in Figure 2 here.

[0034] The nozzles 32 can be arranged staggeredly on both sides here, such that the nozzles 32 on one side are arranged between two nozzles 32 on the other side. In another variant, the nozzles 32 can in principle be arranged unilaterally, but are arranged bilaterally in the region of the sensor mechanism 38, that is, in the region of the guide bar 30 that sweeps across the sensor mechanism 38.

[0035] It is possible to additionally arrange guide elements, in particular sliding or rolling elements, on the guide bar 30, especially in the region of the end with respect to the longitudinal extension L, which ensure the spacing of the guide bar 30 relative to the window pane 12.

Claims

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

2. The windshield wiper device (10) according to claim 1, characterized in that The wiper element (18) has a plurality of nozzles (32) for the discharge of pressurized gas.

3. The windshield wiper device (10) according to claim 2, characterized in that The nozzles (32) are arranged regularly along the longitudinal extension (L) of the wiper element (18).

4. The windshield wiper device (10) according to claim 2 and / or 3, characterized in that The density of the nozzles (32) along the longitudinal extension (L) is higher in the region of the sensor device (38) than in the remaining region of the wiper element (18).

5. The windshield wiper device (10) according to any one of claims 2 to 4, characterized in that The nozzle (32) is arranged at an angle with respect to a vertical line (S) relative to the window panel (12).

6. A windshield wiper device (10) according to any one of the preceding claims, characterized in that The pressurized gas is pressurized air.

7. A windshield wiper device (10) according to any one of the preceding claims, characterized in that A cleaning agent or cleaning liquid is added to the pressurized gas.

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