Wiper device, in particular for motor vehicle, having push-in fastener for wiper lip

Abstract

The invention relates to a wiper device (1), in particular for a motor vehicle, having a wiper arm (2) and a wiper blade (3), the wiper blade (3) having a fastening element (4), on which the wiper blade (3) can be fastened to the wiper arm (2), and a wiper lip (5). According to the invention, the wiper arm (2) has an elongated receiving body (7) which extends along a longitudinal extent (6) and which has a hollow profile (9) which is open at an end (8) of the receiving body (7), and a fastening groove (10) which extends along the longitudinal extent (6) is provided on the hollow profile (9), the fastening element (4) can be pushed into the fastening groove from the open end (8) along the longitudinal extension (6).

Description

Field of the Invention

[0001] The present invention relates to a wiper device, in particular for motor vehicles. In particular, the present invention relates to the fields of passenger cars (PKW) and trucks (LKW). Background Art

[0002] A wiper blade for cleaning vehicle glass is known from DE 19854307 A1. The known wiper blade includes a wiper strip held by a hoop system. Summary of the Invention

[0003] The wiper device according to the invention having the features of the independent claims has the advantage that an improved design and mode of operation can be achieved. Here, a simpler structure of the wiper device and / or easier replacement of the wiper blade can be achieved.

[0004] Furthermore, advantageous refinements and improvements of the features specified in the independent claims are obtained by the measures listed in the dependent claims.

[0005] Advantageously, the fastening groove is constructed at the side of the receiving body of the wiper arm facing the wiper lip. Thereby, a favorable loading is generated by the pressing pressure present relative to the glass during operation. In addition, the fastening portion at the fastening groove can thereby advantageously absorb the forces caused by the frictional force relative to the glass.

[0006] Advantageously, the tab of the fastener extends through the fastening groove of the hollow profile, and the fastener engages behind the hollow profile by means of a head strip arranged inside the hollow profile. Thereby, a reliable connection is obtained. In particular, a reliable form-locking connection can be ensured during the service life.

[0007] Advantageously, an end member is provided which can be detachably connected to the receiving body at the end of the receiving body, and the end member connected to the receiving body stops the fastener in the receiving body in the assembled state to prevent movement out along the longitudinal extension. Here, the fastener is not necessarily connected to the end member. Preferably, the end member can be easily and reliably connected to the receiving body by the user, so that the wiper blade can be easily replaced.

[0008] Advantageously, the end member can be connected to the receiving body by means of a snap-lock connection. Thereby, a detachable connection can be achieved, which can preferably be opened and closed by the user in an easy and intuitive manner. Additionally, in a feasible design, a reusable end member can be achieved in this way.

[0009] Advantageously, the end part has a connecting element, in particular a locking element, which is inserted into a recess constructed in the hollow profile for connecting the end part to the receiver. A reliable connection can thus be achieved, which can be easily loosened and nevertheless can withstand relatively high loads.

[0010] Advantageously, the fastening element has a recess at at least one longitudinal side thereof, into which the rib of the end part is inserted. An advantageous form-fit can thus be achieved, which reliably prevents the fastening element from loosening from the hollow profile of the wiper arm.

[0011] Advantageously, the fastening element has a longitudinal groove extending along the longitudinal side at at least one longitudinal side thereof, into which the rib of the end part is inserted. A reliable connection can thus be achieved between the end part and the fastening element. Additionally, in a feasible design, the end part can be detachably connected to the fastening element.

[0012] Advantageously, the wiper lip has a retaining strip extending along the longitudinal extent, the retaining strip can be pushed into the receiving part of the fastening element along the longitudinal extent, and the retaining strip and the fastening element are connected to each other by a form-fit connection and / or a chemical connection. A at least two-piece design of the wiper blade can thus be achieved. Different materials can thus be combined with each other in an easy manner. However, different materials can also be combined in other ways, for example by coextrusion. Additionally, the fastening element and the retaining strip can also be made of one material.

[0013] Advantageously, the fastening element can be deformed at at least one longitudinal side thereof, in particular by thermal action and / or mechanically, such that the fastening element is shaped into the receiving part of the retaining strip at its longitudinal side. A form-fit can thus be achieved, which prevents displacement along the longitudinal extent.

[0014] Advantageously, the end part and the fastening element are not connected to each other. The end part can thus be reused if necessary after replacing the wiper lip. Additionally, the manufacture of the individual components can be simplified if necessary.

[0015] Advantageously, the fastening element has a head strip, and a void is provided in the head strip extending transversely to the longitudinal extent, wherein the average spacing between the voids decreases towards the end of the hollow profile in the assembled state. The average elasticity or flexibility can be influenced in a targeted manner by the voids. The elasticity or flexibility can thus be increased towards the end. This can improve the wiping effect on the glass.

[0016] One or more of the following features and advantages can be achieved according to the design.

[0017] It is possible to implement a wiper arm, wherein the wiper blade can be replaced by means of a plug-in module. Here, in an advantageous design, four or more components can be provided. The wiper arm can be driven at least indirectly by a rotating motor. The fastening element can serve as the plug-in module and receive or hold the wiper lip. The wiper lip can be configured as a rubber element. In addition, an end component can be provided, which can include the function of an end cap. The end component can be used to fix the fastening element, which is implemented as a plug-in module, to the wiper arm.

[0018] At the wiper arm, together with the end component, a holding function and / or a releasing function and / or a replacement function for the wiper blade or for the fastening element configured as a plug-in module can be implemented. The end component is preferably provided at the end of the wiper arm, which is arranged on an outer track, in particular an outer circular track, during wiping.

[0019] In addition to the fastening element, the plug-in module can also include the wiper lip. The fastening element and the wiper lip can be non-detachably connected to each other. The end component can hold the plug-in module in its position at the wiper arm. For example, by operating a manipulation button that can be provided at the end component, the end component can be loosened from the wiper arm again.

[0020] The wiper arm can have a hollow profile, which can support the fastening element over its entire extent (length). In a modified design, the wiper arm can also support the fastening element only in part and / or in partial sections in one or more sections.

[0021] The fastening element can have a profiled receiving portion, which holds the wiper lip over its entire extent (length). In a modified design, the fastening element can also hold the wiper lip only in part and / or in partial sections.

[0022] The fastening element and the wiper lip can be connected to each other along their extent. Such a connection can be achieved by means of protrusions or recesses and / or notches and / or by thermal action and / or mechanical deformation and / or chemical bonding connections. Such a connection can be provided here at least essentially for fixing along the longitudinal direction or for this purpose.

[0023] The fastening element and the wiper lip can thus be fixed relative to each other, in particular along their extent. This can be achieved completely or partially by the end component. The end component can then be designed such that it prevents not only the fastening element but also the wiper lip from moving out of the wiper arm along their extent. In a preferred design, the end component can be form-fittingly connected to the fastening element and the wiper lip, for example by means of at least one rib preferably configured at the end component for this connection. At least one rib can be inserted into a notch, in particular a cutout, of the fastening element and the wiper lip.

[0024] The end part can be configured with a release function, which can be implemented by an operating button at the end part. In a modified design, the operating button can be configured on the wiper arm. The end part and the wiper arm can then be pushed into each other and releasably connected to each other.

[0025] If the end part is assembled on the wiper arm, in a feasible design, the fastener together with the wiper lip can move freely in principle along its extension range, where the free movement is restricted by the end cap. There can be a certain movement clearance here, so that the fastener together with the wiper lip can move freely within a certain section between the stop provided on the wiper arm and the end cap. The end part can then be removed to replace the fastener together with the wiper lip.

[0026] The end part can hold the fastener to indirectly support the wiper lip during wiping. At the same time, the end part can enclose the end in such a way that the fastener cannot move out of the wiper arm. The wiper lip is preferably firmly connected to the fastener here.

[0027] The fastener can have a profile for receiving the wiper lip. Such a profile can have a head strip with cutouts, which improve the elasticity or bendability. The elasticity and bendability can be optimized by the number and arrangement of these cutouts. In particular, local elasticity or local bendability can be increased towards the outer end of the wiper arm. This can be achieved by providing laterally oriented cutouts spaced apart from each other along the extension range of the head strip, where the spacing between adjacent cutouts decreases towards the outer end. Description of the Drawings

[0028] Preferred embodiments of the present invention are explained in more detail below with reference to the drawings, in which corresponding elements are provided with consistent reference numerals. Among them:

[0029] Figure 1 A wiper device, in particular for a motor vehicle, having a wiper arm and a wiper blade is shown in a schematic spatial view according to a first embodiment;

[0030] Figure 2 Shown in a schematic spatial view according to a first embodiment Figure 1 the wiper arm of the wiper device shown in

[0031] Figure 3 Shown in a schematic spatial view according to a first embodiment Figure 1 the end part of the wiper device shown in

[0032] Figure 4 Shown in a schematic spatial view according to a first embodimentFigure 1 The fasteners of the wiper device shown in

[0033] Figure 5 Is shown in a schematic spatial view according to the first embodiment Figure 1 The wiper lip of the wiper device shown in

[0034] Figure 6 Is shown in a schematic spatial view Figure 1 The wiper device shown in, wherein the situation during the replacement of the wiper blade is shown;

[0035] Figure 7 Is shown in a schematic spatial view Figure 1 The wiper arm of the wiper device shown in and a brief view of the fastener are shown for explaining the design and functional mode of the first embodiment;

[0036] Figure 8 The fastener and the wiper lip of the wiper blade are shown in a brief schematic spatial view according to the first embodiment, wherein a feasible design of the connection between the fastener and the wiper lip is shown;

[0037] Figure 9 The wiper lip of the wiper blade is shown in a brief schematic spatial view according to the first embodiment, wherein a recess for the connection at the wiper lip is shown;

[0038] Figure 10 The fastener and the wiper lip of the wiper blade are shown in a brief schematic spatial view according to the first embodiment, wherein the situation when establishing the connection between the fastener and the wiper lip is shown;

[0039] Figure 11 The fastener and the wiper lip of the wiper blade are shown in a brief schematic spatial view according to the first embodiment, wherein immediately Figure 10 A feasible design of the connection between the fastener and the wiper lip is shown;

[0040] Figure 12 The fastener, the wiper lip and the end part of the wiper blade are shown in a schematic spatial view according to the second embodiment;

[0041] Figure 13 The fastener, the wiper lip and the end part of the wiper blade are shown in a brief schematic spatial cross-sectional view according to the second embodiment, wherein a feasible design of the connection between the end part and not only the fastener but also the wiper lip is shown;

[0042] Figure 14The wiper lip is shown in a simplified schematic spatial view according to the second embodiment, wherein a recess is shown which represents a possible design for the connection between the end part and the wiper lip;

[0043] Figure 15 The fastening element is shown in a simplified schematic spatial view according to the second embodiment, wherein a recess is shown which represents a possible design for the connection between the end part and the fastening element;

[0044] Figure 16 The end part is shown in a simplified schematic spatial view according to the second embodiment, wherein a possible design for ribs is shown which are provided for the connection between the end part and both the fastening element and the wiper lip;

[0045] Figure 17 The wiper device is shown in a simplified schematic spatial view according to the third embodiment, wherein a possible design for the connection between the end part and the wiper arm is shown in terms of a snap connection.

[0046] Figure 18 The wiper device is shown in a schematic spatial view according to the fourth embodiment, wherein the situation during assembly is shown;

[0047] Figure 19 The wiper device shown in Figure 18 is shown in a schematic spatial view in the assembled state according to the fourth embodiment;

[0048] Figure 20 The fastening element is shown in a schematic spatial view according to a possible design, and

[0049] Figure 21 is shown in an idealized view in a bent state in order to illustrate the elasticity or flexibility which varies along the extent of the fastening element. Figure 20 Detailed Description of the Invention

[0050] Figure 1 The wiper device 1 is shown in a schematic spatial view according to the first embodiment, which has a wiper arm 2 and a wiper blade 3. The wiper device 1 can be used in particular for motor vehicles. Furthermore, Figure 2 The wiper arm 2 of the wiper device 1 shown in Figure 1 is shown in a schematic spatial view according to the first embodiment.

[0051] The wiper device 1 includes a plurality of components, namely a wiper arm 2 and a wiper blade 3. The wiper blade 3 in turn includes a fastening element 4 and a wiper lip 5, at which the wiper blade 3 is fastened to the wiper arm 2. The wiper arm 2 includes an elongate receiving body 7 extending along a longitudinal extent 6. The receiving body 7 has a hollow profile 9 that is open at an end 8.

[0052] A fastening groove 10 extending along the longitudinal extent 6 is configured in the hollow profile 9. The fastening element 4 can be pushed into the fastening groove along the longitudinal extent 6 starting from the open end 8.

[0053] The wiper arm furthermore has a fastening body 11 with a fastening hole 12. At the fastening hole 12, a shaft driven by an electric motor can be fastened.

[0054] Figure 3 The end part 18 of the wiper device 1 shown in Figure 1 is shown in a schematic spatial view according to a first embodiment. Furthermore, Figure 4 the fastening element 4 of the wiper device 1 shown in Figure 1 is shown in a schematic spatial view according to a first embodiment. Figure 5 The wiper lip 5 of the wiper device 1 shown in Figure 1 is shown in a schematic spatial view according to a first embodiment.

[0055] Figure 6 The wiper device 1 shown in Figure 1 is shown in a schematic spatial view, wherein the situation during the replacement of the wiper blade 3 is shown. Here, the fastening element 3 together with the wiper lip 5 can be pushed into the fastening groove 10 at the wiper arm 2 or pulled out again along the longitudinal extent 6 according to the double arrow 13. Thereby, the wiper blade 3 can be easily replaced.

[0056] Figure 7 The wiper arm 2 of the wiper device 1 shown in Figure 1 is shown in a schematic spatial view and a simplified view of the fastening element 4 is shown for explaining the design and the mode of operation of the first embodiment. The fastening groove 10 is configured at a side part 15 of the receiving body 7 of the wiper arm 2 facing the wiper lip 5.

[0057] If the wiper blade is assembled, the tab 16 of the fastening element 4 extends through the fastening groove 10 of the hollow profile 9. In the present embodiment, the fastening element 4 has a head strip 17 that is arranged inside the hollow profile 9 in the assembled state. The fastening element 4 engages the hollow profile 9 from behind with its head strip 17.

[0058] The end part 18 is releasably connected to the receiving body 7 at the end 8 of the receiving body 7. The end part 18 connected to the receiving body 7 stops the fastening element 4 in the receiving body 7 to prevent it from moving out along the longitudinal extension 6, i.e., to effect such stopping in terms of the movement of the double arrow 13 shown in Figure 6 A certain clearance of the fastening element 4 relative to the end part 18 can be provided or not provided here according to the design.

[0059] Figure 8 The fastening element 4 of the wiper blade 3 and the wiper lip 5 are shown in a simplified schematic spatial view according to the first embodiment, wherein a feasible design of the connection between the fastening element 4 and the wiper lip 5 is shown.

[0060] In this embodiment, the wiper lip 5 has a retaining strip 20 extending along the longitudinal extension 6. The retaining strip 20 can be pushed into the receiving part 21 of the fastening element 4 along the longitudinal extension 6. The retaining strip 20 and the fastening element 4 are then connected to each other at least by a form-fitting connection. As an additional or alternative solution, a chemical connection can also be achieved between the wiper lip 5 and the fastening element 4. Thus, the wiper lip 5 and the fastening element can be reliably connected to each other.

[0061] Figure 9 The wiper lip 5 of the wiper blade 3 is shown in a simplified schematic spatial view according to the first embodiment, wherein a recess 23 for the connection is shown at the wiper lip 5. Figure 10 The fastening element 4 of the wiper blade 3 and the wiper lip 5 are shown in a simplified schematic spatial view according to the first embodiment, wherein the situation when establishing the connection between the fastening element 4 and the wiper lip 5 is shown. The action of heat is shown by the arrow 29. In addition, Figure 11 The fastening element 4 of the wiper blade 3 and the wiper lip 5 are shown in a simplified schematic spatial view according to the first embodiment, wherein immediately Figure 10 A feasible design of the connection between the fastening element 4 and the wiper lip 5 is shown.

[0062] The fastening element 4 can be deformed at its longitudinal sides 24, 25. As Figure 10 shown, the fastening element 4 can be shaped, for example by the action of heat 29, into the receiving part 21 of the retaining strip 20 at its longitudinal side 24 on the one hand and into the corresponding receiving part at its longitudinal side 25 on the other hand. Thereby, a recess 22 is obtained at the longitudinal side 24. A corresponding recess can be formed at the longitudinal side 25. As an additional or alternative solution, the deformation of the fastening element can also be achieved mechanically, as shown by the tool 34 in Figure 10 A chemical connection can be additionally achieved. Thus, the wiper lip 5 is then fixed relative to the fastening element 4 especially along the longitudinal extension 6.

[0063] Figure 12 The fastener 4, the wiper lip 5 and the end part 18 of the wiper blade 3 are shown in a schematic spatial view according to a second embodiment. In addition, Figure 13 The fastener 4, the wiper lip 5 and the end part 18 of the wiper blade 3 are shown in a brief schematic spatial sectional view according to a second embodiment, wherein a feasible design of the connection between the end part 18 and not only the fastener 4 but also the wiper lip 5 is shown.

[0064] Figure 14 The wiper lip 5 is shown in a brief schematic spatial view according to a second embodiment, wherein a recess 23 is shown at the wiper lip 5 for a feasible design of the connection between the end part 18 and the wiper lip 5. In addition, Figure 15 The fastener 4 is shown in a brief schematic spatial view according to a second embodiment, wherein a recess 26 is shown for a feasible design of the connection between the end part 18 and the fastener 4. Figure 16 The end part 18 is shown in a brief schematic spatial view according to a second embodiment, wherein feasible designs of ribs 28, 32, 33 are shown for the connection between the end part 18 and not only the fastener 4 but also the wiper lip 5.

[0065] The fastener 4 has recesses 26, 27 at its longitudinal sides 24. In this embodiment, the ribs 28 of the end part 18 are inserted into the recesses 26, 27, wherein Figure 13 and Figure 16 only one rib 28 is provided at the longitudinal side 24. In addition, the fastener 4 has longitudinal grooves 30, 31 extending along the longitudinal sides 24, 25 at its longitudinal sides 24, 25, and the ribs 32, 33 of the end part 18 are inserted into the longitudinal grooves.

[0066] Figure 17 The wiper device 1 is shown in a brief schematic spatial view according to a third embodiment, wherein a feasible design of the connection between the end part 18 and the wiper arm 2 is shown according to a snap connection.

[0067] The end part 18 can be connected to the receiving body 7 by a snap connection. For this purpose, the end part 18 is inserted into the hollow profile 9 of the wiper arm 2 in the direction of arrow 39 at the open end 8. The end part 18 has a connecting element 40, which is designed as a snap element 40 in this embodiment. The snap element 40 is inserted into a recess 41 constructed in the hollow profile 9 in the assembled state, as shown correspondingly in Figure 1 this is shown.

[0068] Figure 18The wiper device 1 is shown in a schematic spatial view according to a fourth embodiment, wherein the situation during assembly is shown. Furthermore, Figure 19 The wiper device 1 shown in a schematic spatial view according to a fourth embodiment in the assembled state Figure 18 is shown. The end part 18 and the fastening element 4 are not connected to one another here. The fastening element 4 and the wiper lip 5 connected to the fastening element 4 can move back and forth in the fastening groove 10 here, if necessary, slightly along the longitudinal extension 6, wherein, however, loss prevention is achieved by the end part 18.

[0069] Figure 20 The fastening element 4 is shown in a schematic spatial view according to a possible design. Furthermore, Figure 21 is shown in an idealized view in the bent state Figure 20 the fastening element 4 shown therein, in order to show the elasticity or bendability that changes along the extension of the fastening element 4.

[0070] In the present embodiment, the fastening element 4 has a head strip 17, in which cutouts 45A to 45G extending transversely to the longitudinal extension 6 are provided. In the present embodiment, the cutouts 45A to 45G are oriented at least approximately 90° to the longitudinal extension 6 of the head strip 17. The average spacing L between the cutouts 45A to 45G decreases towards the end 8 of the hollow profile 9. The spacing L1 between the cutouts 45A, 45B arranged closer to the end 8 is, for example, smaller than the spacing L2 between the cutouts 45F, 45G arranged further away from the end 8. This results in a variable bendability along the longitudinal extension 6, which is shown Figure 21 therein.

[0071] The invention is not limited to the described embodiments.

Claims

1. A windshield wiper device (1), in particular for a motor vehicle, comprising a wiper arm (2) and a wiper blade (3), wherein: The wiper blade (3) has a fastening element (4) and a wiper lip (5), at which the wiper blade (3) can be fastened to the wiper arm (2). It is characterized in that The wiper arm (2) has an elongated receiving body (7) extending along a longitudinal extension (6), the receiving body having a hollow profile (9) which is open at an end (8) of the receiving body (7), and a fastening groove (10) extending along the longitudinal extension (6) is provided on the hollow profile (9), and the fastening element (4) can be pushed into the fastening groove starting from the open end (8) along the longitudinal extension (6).

2. The windshield wiper device according to claim 1, It is characterized in that The fastening groove (10) is formed on a side (15) of a receiving body (7) of the wiper arm (2) that faces the wiper lip (5).

3. The windshield wiper device according to claim 1 or 2, It is characterized in that The tabs (16) of the fastening element (4) extend through the fastening grooves (10) of the hollow profile (9), and the fastening element (4) engages the hollow profile (9) from behind by means of a head strip (17) of the fastening element (4) arranged inside the hollow profile (9).

4. The windshield wiper device according to any one of claims 1 to 3, It is characterized in that An end piece (18) is provided which can be releasably connected to the receiving body (7) at the end (8) of the receiving body (7), and the end piece (18) connected to the receiving body (7) in the assembled state stops the fastening element (4) in the receiving body (7) to prevent movement out along the longitudinal extension range (6).

5. The windshield wiper device according to claim 4, It is characterized in that a) the end piece (18) can be connected to the receiving body (7) by means of a snap connection, and / or b) The end piece (18) has a connecting element (40), in particular a latching element, which engages in a recess (41) formed in the hollow profile (9) for connecting the end piece (18) to the receiving body (7).

6. The windshield wiper device according to claim 4 or 5, It is characterized in that a) the fastening element (4) has a recess (26, 27) on at least one of its longitudinal sides (24, 25), into which the rib (28) of the end piece (18) engages, and / or b) The fastener (4) has, on at least one of its longitudinal sides (24, 25), a longitudinal groove (30, 31) extending along the longitudinal side (24, 25), into which the ribs (32, 33) of the end piece (18) are embedded.

7. The windshield wiper device according to any one of claims 1 to 6, It is characterized in that The wiper lip (5) has a retaining strip (20) extending along the longitudinal extension (6), the retaining strip (20) being insertable into a receptacle (21) of the fastening element (4) along the longitudinal extension (6), and the retaining strip (20) and the fastening element (4) being connected to one another via a form-fitting connection and / or a chemical connection.

8. The windshield wiper device according to claim 7, It is characterized in that The fastening element (4) is deformable at at least one of its longitudinal sides (24, 25), in particular by thermal and / or mechanical deformation, in such a way that the fastening element (4) is integrally formed at its longitudinal sides (24, 25) into a receptacle (21) of the retaining strip (20).

9. The windshield wiper device according to claim 4 or 5, It is characterized in that The end piece (18) and the fastener (4) are not connected to each other.

10. The windshield wiper device according to any one of claims 1 to 9, It is characterized in that The fastening element (4) has a head strip (17) and recesses (45A-45G) extending transversely to the longitudinal extension (6) are provided in the head strip (17), wherein an average spacing (L) between the recesses (45A-45G) decreases towards an end (8) of the hollow profile (9) in the assembled state.

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