Windscreen wiper device

Abstract

The invention relates to a windscreen wiper device (10) for cleaning a vehicle windscreen (12), comprising at least one wiper blade (16a, 16b), which extends in a longitudinal extension direction (L) and has a plurality of nozzle elements (100) for applying a fluid (24), in particular a cleaning fluid, to the windscreen (12), the nozzle elements (100) are distributed on the wiper blades (16a, 16b) in the longitudinal extension direction. According to the invention, the wiper blade (16a, 16b) has at least one first longitudinal section (70a) and at least one second longitudinal section (70b), the nozzle density in the first longitudinal section (70a) being lower with respect to the longitudinal extension (L) than in the second longitudinal section (70b) of the same wiper blade (16a, 16b).

Description

Field of the Invention

[0001] The invention relates to a window wiper device, in particular for a motor vehicle, of a type according to the independent claims, and a wiper blade. Background Art

[0002] Known window wiper devices, in particular for motor vehicles, have a wiper blade with an integrated nozzle element for directly applying a cleaning fluid through the wiper blade onto the window pane. Summary of the Invention

[0003] The invention relates to a window wiper device for cleaning a vehicle window pane, the window wiper device having at least one wiper blade which extends in a longitudinal extension direction and has a plurality of nozzle elements for applying a fluid, in particular a cleaning fluid, onto the window pane, wherein the nozzle elements are arranged distributed in the longitudinal extension direction at the wiper blade. According to the invention, it is now proposed that the wiper blade has at least one first longitudinal section and a second longitudinal section, wherein the nozzle density is lower with respect to the longitudinal extension direction in the first longitudinal section than in the second longitudinal section of the same wiper blade.

[0004] The window wiper device according to the invention has the advantage that the undesired accumulation of water in the overlapping region of two wiper blades, in particular in a front window wiper device, can be advantageously reduced. Furthermore, the amount of cleaning fluid required can be advantageously reduced by means of the invention. Due to the reduced accumulation of the cleaning fluid in the overlapping region between two wiper blades which each sweep a cleaning area on the window pane, the driver's field of vision can be particularly advantageously improved during the cleaning process. This asymmetrical arrangement enables a targeted adaptation of the cleaning performance in different regions of the window pane. Preferably, the swept area of the first longitudinal section is supplied with cleaning fluid during operation by another longitudinal section of the same wiper blade or another wiper blade, so that the accumulation due to the overlap of the cleaning areas can be advantageously reduced.

[0005] In the context of the invention, the longitudinal section with a reduced nozzle density can in particular be understood as the following section of the wiper blade, in which section the number of nozzles in the longitudinal extension of this section is constructed significantly lower than in the adjacent longitudinal sections of the wiper blade.

[0006] Advantageous refinements and improvements of the features specified in the independent claims are obtained by the measures recited in the dependent claims.

[0007] In a preferred embodiment, the first longitudinal section is arranged in the inner circle of the wiper blade, while in an alternative embodiment, the first longitudinal section is located in the outer circle of the wiper blade. Preferably, the longitudinal sections each extend substantially from the end cap region to the central wiper blade adapter element and are preferably arranged opposite each other.

[0008] The wiper blade can furthermore have at least one first wind deflector element, a second wind deflector element and at least one wiper lip, wherein the nozzle element is preferably configured in the wind deflector element. The nozzle opening is preferably introduced into the wind deflector element or the deflector element by means of a laser.

[0009] In a further embodiment, two wiper blades can be provided, wherein each wiper blade sweeps an independent cleaning area during operation, and the cleaning areas have an overlapping area relative to one another. Preferably, the first wiper blade sweeps an inner ring area, and the second wiper blade sweeps an outer ring area, wherein the overlapping area is arranged between the inner ring area and the outer ring area. The overlapping area within the framework of the present invention is the following area of the window pane which is swept by both the first wiper blade and the second wiper blade during the operation of the wiper blade.

[0010] Preferably, a first longitudinal section can be configured at the first wiper blade and / or the second wiper blade. Preferably, the first longitudinal section can be configured in the wiper blade inner ring or the wiper blade outer ring of these wiper blades.

[0011] According to an advantageous refinement of the invention, the longitudinal sections preferably each extend substantially from the end cap region to the central wiper blade adapter element and are preferably arranged opposite one another.

[0012] The wiper blade of the type discussed here preferably has at least one first wind deflector element, a second wind deflector element and at least one wiper lip, wherein the nozzle element is preferably configured in the wind deflector element.

[0013] In particular, a particularly easy reduction of the accumulation of fluid in the overlapping area can be provided by arranging the first longitudinal section in the area of the overlapping area to be swept. In this way, less fluid is brought into the overlapping area by at least one of the wiper blades in the wiper blade, so that the accumulation of the cleaning fluid in this area can be advantageously reduced.

[0014] It is conceivable that the first longitudinal section with a reduced nozzle density is arranged outside the overlapping area. Then the forces acting on the fluid can be utilized to provide a more uniform distribution of the washing water.

[0015] A particularly efficient reduction of the accumulation of fluid in the overlapping area can be achieved by reducing the nozzle density in the first longitudinal section by at least 20%, in particular 30%, and particularly advantageously 40% relative to the second longitudinal section. In this way, the corresponding cleaning performance of the area can be ensured at the same time.

[0016] In particular, a particularly uniform cleaning result can be provided by arranging the nozzle elements of the longitudinal sections substantially equidistantly relative to one another. Description of the Drawings

[0017] Embodiments of the present invention are shown in the drawings and are explained in more detail in the following description.

[0018] Wherein:

[0019] Figure 1 A schematic view of the wiper blade of the windowpane wiper device is shown,

[0020] Figure 2a 、 Figure 2b 、 Figure 3a 、 Figure 3b Embodiments of the windowpane wiper device are shown respectively.

[0021] In different implementation variants, the same components have the same reference numerals. Detailed implementation

[0022] In Figure 1 a schematic view of an embodiment of the wiper blade 16 of the windowpane wiper device 10 is shown. The wiper blade 16 has a longitudinal direction L as the main extension direction. In particular, the longitudinal direction L is substantially parallel to the main extension direction of the wiper blade. In particular, the longitudinal direction L is at least substantially perpendicular to the defined wiping direction of the wiper blade 16. Preferably, the wiper blade 16 includes end caps 42a, 42a arranged in end cap regions 48a, 48b not shown in more detail. Preferably, the wiper blade 16 includes a wiper blade adapter 46. Preferably, the wiper blade 16 includes two windscreen elements 50a, 50b. Preferably, the windscreen elements 50a, 50b each have a plurality of nozzle elements 100. The nozzle elements 100 are preferably introduced into the wiper blade 16, in particular into the windscreen elements 50a, 50b, as nozzle openings by means of a laser. The wiper blade 16 furthermore preferably has a spring guide 17 and a wiper lip 19. Preferably, the windscreen elements 50a, 50b have fluid supply lines leading to the nozzle elements 100.

[0023] As can be recognized in Figure 1 , the wiper blade has at least one first longitudinal section 70a and a second longitudinal section 70b. Compared with the second longitudinal section 70b, the first longitudinal section 70a has a significantly lower nozzle density, that is to say fewer nozzle elements 100, with respect to the longitudinal extension direction. According to the embodiment shown in Figure 1 , the first longitudinal section 70a has only three nozzle elements 100, while the second longitudinal section has seven nozzle openings distributed over the entire length of the windscreen element 50b. Preferably, the nozzle elements 100 of the windscreen elements 70a, 70b are arranged substantially equidistant from each other.

[0024] Figure 1The wiper blade 16 shown in the figure can be the first wiper blade 16a of the inner ring area or the second wiper blade 16b of the outer ring area. In addition, the first longitudinal section 70a can be arranged in the inner wiper ring or the outer wiper ring of the wiper blades 16a, 16b. In Figure 2a , Figure 2b , Figure 3a , Figure 3b These different embodiments are shown and explained.

[0025] In Figure 2a , Figure 2b , Figure 3a , Figure 3b embodiments of the window wiper device 10 for cleaning the window pane 12 are shown respectively. In Figure 2a , Figure 2b , Figure 3a , Figure 3b the window wiper device 10 is shown in the stationary position respectively. Figure 2a , Figure 2b , Figure 3a , Figure 3b the window wiper devices 10 each have a first wiper blade 16a and a second wiper blade 16b. Each of the wiper blades 16a, 16b has a cleaning area 20a, 20b on the window pane 12 respectively. The two cleaning areas 20a, 20b each have an overlapping area 22.

[0026] The first cleaning area 20a is arranged in the area on the driver's side of the vehicle. The first wiper blade 16a is connected to a first pivot point by a first wiper arm, wherein the first wiper blade 16a and the first wiper arm perform a swinging movement, wherein the first cleaning area 20a is swept over. The second wiper blade 16b is provided for wiping the second cleaning area 20b of the window pane 12, which is at least partially different from the first cleaning area 20a.

[0027] The first cleaning area 20a and the second cleaning area 20b have an overlapping area 22 at least on the central part of the windshield. According to Figure 2a , Figure 2b , Figure 3a , Figure 3b embodiments of the present invention are provided for advantageously reducing the overlap of the wiper water volume and thus its accumulation in the overlapping area 22.

[0028] In Figure 2aA first embodiment of the present invention is shown, according to which the first wiper blade 16a has two longitudinal sections 70b, 70b' with a nozzle density of uniform size respectively. The second wiper blade 16b has a second longitudinal section 70b, which also has a nozzle distribution density substantially corresponding to the nozzle density of the two longitudinal sections of the first wiper blade 16a. According to the first embodiment, the second wiper blade 16b has a first longitudinal section 70a, which has a reduced nozzle density relative to the second longitudinal section, that is, distributed in the longitudinal extension direction of the first longitudinal section 70a, the second wiper blade has significantly fewer nozzle elements 100 in the first longitudinal section 70a than in the second longitudinal section 70b. The first longitudinal section 70a is arranged in the inner circle of the wiper blade, that is, the section facing the pivot point. According to the embodiment shown in Figure 2a the first longitudinal section 70a is arranged in the overlapping area of the overlapping area 22.

[0029] According to the embodiment shown in Figure 2a the first wiper blade 16a has a regular nozzle density of preferably between 5 and 10 nozzle elements 100 distributed within the length of the two longitudinal sections 70b, 70b'. In the case of a functional failure of the second wiper blade 16b, the first wiper blade 16a always still provides a minimum cleaning performance for reliable driving.

[0030] The second wiper blade 16b has an optimized nozzle configuration. The number of nozzle openings or nozzle elements 100 is lower at the inner circle of the wiper blade compared to the outer circle of the wiper blade. Due to the reduced number of nozzle elements 100 in the first longitudinal section 70a, less cleaning fluid is introduced into the overlapping area 22 by the second wiper blade 16b, so that the overlapping area is substantially supplied with cleaning fluid by the first wiper blade 16a.

[0031] In Figure 2bThe second embodiment of the present invention is shown. According to this second embodiment, the first wiper blade 16a respectively has two longitudinal sections 70b, 70b' with a nozzle density of uniform size corresponding to the first embodiment of the present invention. The second wiper blade 16b has a second longitudinal section 70b, which also has a nozzle distribution density corresponding to the nozzle density of the two longitudinal sections of the substantially first wiper blade 16a. According to the first embodiment, the second wiper blade 16b has a first longitudinal section 70a, which has a reduced nozzle density relative to the second longitudinal section, that is, distributed in the longitudinal extension direction of the first longitudinal section 70a, the second wiper blade has significantly fewer nozzle elements 100 in the first longitudinal section 70a than in the second longitudinal section 70b. The first longitudinal section 70a is arranged in the wiper outer circle of the wiper blade 16b, that is, in the section away from the pivot point. According to the embodiment shown in Figure 2b the first longitudinal section 70a is arranged outside the overlapping area of the overlapping area 22.

[0032] According to the embodiment shown in Figure 2a the first wiper blade 16a has a regular nozzle density of preferably between 5 and 10 nozzle elements 100 distributed over the length of the two longitudinal sections 70b, 70b'. In the case of a functional failure of the second wiper blade 16b, the first wiper blade 16a still always provides a minimum cleaning performance for reliable driving.

[0033] The second wiper blade 16b has an optimized nozzle configuration. The number of nozzle openings or nozzle elements 100 is lower at the outer circle of the wiper blade compared to the inner circle of the wiper blade. During wiping, the cleaning fluid flows from the second wiper blade 16b towards the outer circle of the wiper blade based on rotational physics. Due to the reduced amount of water wiped in the outer circle of the wiper blade achieved by the first longitudinal section 70a arranged in the outer circle of the wiper blade, the cleaning fluid can advantageously leak from the inner circle, that is, from the overlapping area 22, into the outer circle of the wiper blade, thereby advantageously reducing the accumulation of fluid in the overlapping area 22.

[0034] The first longitudinal sections of different embodiments 2a, 2b, 3a, 3b preferably have a significantly reduced nozzle density relative to the first longitudinal section 70b. Preferably, the nozzle density in the first longitudinal section 70a is reduced by at least 20%, preferably 30%, and particularly preferably 40% relative to the second longitudinal sections 70b, 70b'. Preferably, the first longitudinal section 70a only has between 2 and 5 nozzle elements 100.

[0035] In Figure 3a, according to which the second wiper blade 16b has two longitudinal sections 70b, 70b′ with a uniform nozzle density. The first wiper blade 16a has a second longitudinal section 70b which also has a nozzle distribution density which substantially corresponds to the nozzle density of the two longitudinal sections 70b, 70b′ of the second wiper blade 16b. According to a third embodiment, the first wiper blade 16a has a first longitudinal section 70a which has a reduced nozzle density relative to the second longitudinal section 70b, i.e., distributed in the longitudinal extension direction of the first longitudinal section 70a, the first wiper blade 16a has significantly fewer nozzle elements 100 in the first longitudinal section 70a than in the second longitudinal section 70b. The first longitudinal section 70a is arranged here in the outer circle of the wiper blade 16a, i.e. in a section facing away from the rotation point. According to the present invention, in Figure 3a In the embodiment shown in FIG. 1 , the first longitudinal section 70 a is arranged in the overlapping region of the overlap region 22 .

[0036] According to the present invention Figure 3a In the embodiment shown in FIG. 1 , the second wiper blade 16 b has in two longitudinal sections 70 b , 70 b ′ a regular nozzle density of preferably between 5 and 10 nozzle elements 100 distributed over the length of the sections.

[0037] The first wiper blade 16b has an optimized nozzle configuration. The number of nozzle openings or nozzle elements 100 at the outer circumference of the wiper blade is lower than at the inner circumference of the wiper blade. Due to the reduced number of nozzle elements 100 in the first longitudinal section 70a, less cleaning fluid is introduced into the overlap region 22 by the first wiper blade 16a, so that the overlap region is substantially supplied with cleaning fluid by the second wiper blade 16b, and the undesired accumulation of excess cleaning fluid in the overlap region can be advantageously reduced.

[0038] exist Figure 3b , according to which the first wiper blade 16a has a first longitudinal section 70a with a reduced nozzle density in the inner circle of the wiper blade. Due to the physics of rotation, the cleaning fluid of the first wiper blade 16a moves in the direction of the outer circle of the wiper blade. Due to the reduced amount of cleaning fluid at the inner circle of the wiper blade, advantageously less cleaning fluid flows in the direction of the outer circle of the wiper blade of the first wiper blade 16a and thus flows into the overlap region 22.

Claims

1. A windshield wiper device (10) for cleaning a vehicle windshield (12), comprising at least one wiper blade (16a, 16b) extending in a longitudinal extension direction (L) and having a plurality of nozzle elements (100) for applying a fluid (24), in particular a cleaning fluid, to the windshield (12), wherein: The nozzle elements (100) are arranged on the wiper blades (16a, 16b) distributed along the longitudinal extension direction. Characterized in that the wiper blade (16a, 16b) has at least one first longitudinal section (70a) and at least one second longitudinal section (70b), wherein the nozzle density in the first longitudinal section (70a) is lower with respect to the longitudinal extension direction (L) than in the second longitudinal section (70b) of the same wiper blade (16a, 16b).

2. The windshield wiper device (10) according to claim 1, It is characterized in that At least one first wiper blade (16a) and a second wiper blade (16b) are provided, wherein the first wiper blade (16a) sweeps through a first cleaning zone (20a) during operation, and wherein the second wiper blade (16b) sweeps through a second cleaning zone (20b) during operation, wherein the cleaning zones (20a, 20b) have an overlapping area (22), wherein preferably at least one wiper blade (16a, 16b) has a first longitudinal section (70a) with a lower nozzle density.

3. The windshield wiper device (10) according to claim 1, It is characterized in that At least one wiper blade (16a, 16b) has two second longitudinal sections (70b, 70b') which have a higher nozzle density than a first longitudinal section (70a) of the other wiper blade (16a, 6b).

4. The windshield wiper device (10) according to claim 1, It is characterized in that The first longitudinal section (70a) is arranged in a wiper blade inner ring of the first wiper blade (16a, 16b) and / or of the second wiper blade (16a, 16b).

5. The windshield wiper device (10) according to claim 1, It is characterized in that The first longitudinal section (70a) is arranged in a wiper blade outer ring of the first wiper blade (16a, 16b) and / or of the second wiper blade (16a, 16b).

6. A windshield wiper device (10) according to any one of the preceding claims, It is characterized in that The longitudinal sections (70a, 70b, 70b') preferably each extend substantially from an end cap region (48a, 48b) to a central wiper blade adapter element (46) and are preferably each arranged oppositely on the respective wiper blade (16a, 16b).

7. A windshield wiper device (10) according to any one of the preceding claims, It is characterized in that The wiper blade (16a, 16b) comprises at least one first wind deflector element (50a), a second wind deflector element (50b) and at least one wiper lip (19), wherein the nozzle element (100) is preferably formed in the first wind deflector element and the second wind deflector element (50a, 50b).

8. The windshield wiper device (10) according to claim 1, It is characterized in that The first longitudinal section (70a) is arranged in the region of the overlap region (22).

9. The windshield wiper device (10) according to claim 1, It is characterized in that The first longitudinal section (70a) is arranged outside the overlapping region (22).

10. The windshield wiper device (10) according to claim 1, It is characterized in that The nozzle density in the first longitudinal section (70a) is reduced by at least 20 percent, in particular by 30 percent, particularly advantageously by 40 percent, relative to the second longitudinal section (70b, 70b').

11. The windshield wiper device (10) according to claim 1, It is characterized in that The nozzle elements (100) of the longitudinal sections (70a, 70b, 70b') are arranged substantially equidistantly relative to one another.

12. Wiper blade (16a, 16b) for a windshield wiper device (10) according to any one of claims 1 to 11.

Images