Wiper device, in particular for a motor vehicle, with a retractable fastening part for a wiper lip

Abstract

Wiper device (1), in particular for a motor vehicle, with a wiper arm (2) and a wiper blade (3), wherein the wiper blade (3) has a fastening part (4) to which the wiper blade (3) can be fastened to the wiper arm (2), and a wiper lip (5). It is proposed that the wiper arm (2) has an elongate receiving body (7) extending along a longitudinal extent (6) and having a hollow profile (9) open at one end (8) of the receiving body (7), and that a fastening slot (10) running along the longitudinal extent (6) is provided on the hollow profile (9), into which fastening slot the fastening part (4) can be inserted from the open end (8) along the longitudinal extent (6).

Description

State of the art

[0001] The invention relates to a wiper device, particularly for a motor vehicle. Specifically, the invention relates to the field of passenger cars (PCs) and trucks (HGVs).

[0002] DE 198 54 307 A1 discloses a wiper blade for cleaning motor vehicle windows. The known wiper blade comprises a wiper strip held by a support bracket system. Disclosure of the invention

[0003] The wiper device according to the invention with the features of the main claim has the advantage of enabling an improved design and functionality. This allows for a simpler construction of a wiper device and / or easier replacement of a wiper blade.

[0004] The measures listed in the subclaims also result in advantageous developments and improvements of the features specified in the main claim.

[0005] It is advantageous that the fastening slot is formed on a side of the wiper arm's receiving body facing the wiper lip. This results in advantageous loading by the contact pressure exerted against the windshield during operation. Furthermore, the fastening to the fastening slot can advantageously absorb forces caused by frictional forces against the windshield.

[0006] It is advantageous that a web of the fastening part extends through the fastening slot of the hollow profile and that the fastening part engages behind the hollow profile with a head strip of the fastening part arranged inside the hollow profile. This results in a reliable connection. In particular, a reliable, positive-locking connection can be guaranteed over the entire service life.

[0007] It is advantageous that an end piece is provided that can be detachably connected to the receiving body at the end of the receiving body. The end piece connected to the receiving body, when mounted, secures the fastening part in the receiving body against moving out along its longitudinal extension. In this case, the fastening part is not necessarily connected to the end piece. The end piece can preferably be easily and reliably connected to the receiving body by a user, thus enabling simple replacement of the wiper blade.

[0008] It is advantageous that the end piece can be connected to the receiving body by means of a snap-in connection. This allows for a detachable connection that can preferably be opened and closed easily and intuitively by a user. In addition, a possible design can be implemented in this way to create a reusable end piece.

[0009] It is advantageous that the end piece has a connecting element, in particular a locking element, which engages in a recess formed in the hollow profile to connect the end piece to the receiving body. This allows for a reliable connection that is easy to release yet relatively resilient.

[0010] It is advantageous that the fastening part has a recess on at least one of its long sides, into which a rib of the end piece engages. This allows for a favorable positive fit that reliably prevents the fastening part from becoming detached from the hollow profile of the wiper arm.

[0011] It is advantageous for the fastening part to have a longitudinal groove extending along at least one of its longitudinal sides, into which a rib of the end piece engages. This allows for a reliable connection between the end piece and the fastening part. In addition, in one possible embodiment, the end piece can be detachably connected to the fastening part.

[0012] It is advantageous that the wiper lip has a retaining strip extending along its longitudinal extent, that the retaining strip can be inserted into a receptacle in the fastening part along its longitudinal extent, and that the retaining strip and the fastening part are connected to one another by a positive connection and / or a chemical connection. This enables an at least two-part design of the wiper blade. This makes it easy to combine different materials. However, a combination of different materials is also possible in other ways, for example by coextrusion. Furthermore, the fastening part and the retaining strip can also be formed from one material.

[0013] It is advantageous that the fastening part is deformable on at least one of its longitudinal sides, in particular by heat and / or mechanically deformable, such that the fastening part is molded into the receptacle of the retaining strip on its longitudinal side. This allows for a positive fit that prevents adjustment along the longitudinal extent.

[0014] It is advantageous that the end piece and the fastening part are not connected to each other. This allows the end piece to be reused after replacing the wiper lip. Furthermore, the manufacturing of the individual components can be simplified if necessary.

[0015] It is advantageous that the fastening part has a head strip and that recesses are provided in the head strip running transversely to the longitudinal extension, with the average distance between the recesses decreasing toward the end of the hollow profile when installed. The recesses can be used to specifically influence the average elasticity or bendability. Thus, the elasticity or bendability can be increased toward the end. This can improve the effectiveness of windshield wiping.

[0016] Depending on the design, one or more of the following features and advantages can be realized.

[0017] A wiper arm can be realized in which wiper blades can be replaced via a plug-in module. In an advantageous embodiment, four or more components can be provided. The wiper arm can be driven at least indirectly by a rotating motor. A fastening part can serve as a plug-in module and accommodate or hold a wiper lip. The wiper lip can be designed as a rubber element. In addition, an end piece can be provided, which can function as an end cap. The end piece can serve to fix the fastening part designed as a plug-in module to the wiper arm.

[0018] Together with the end piece, the wiper arm can provide a holding function and / or release function and / or replacement function for the wiper blade or the fastening part designed as a plug-in module. The end piece is preferably provided at the end of the wiper arm that is arranged on the outer track, in particular the outer circular track, during wiping.

[0019] The plug-in module can encompass the wiper lip in addition to the fastening part. The fastening part and the wiper lip can be permanently connected to each other. The end piece can hold the plug-in module in position on the wiper arm. For example, by pressing an actuation button, which can be provided on the end piece, the end piece can be released from the wiper arm.

[0020] The wiper arm can have a hollow profile that can support the fastening part along its entire extension (length). In a modified design, the wiper arm can also support the fastening part only in parts and / or in sections in one or more sections.

[0021] The fastening part can have a profile-shaped receptacle that holds the wiper lip over its entire length. In a modified design, the fastening part can also hold the wiper lip only at parts and / or in sections.

[0022] The fastening part and the wiper lip can be connected to each other along their length. This connection can be realized by projections or indentations and / or recesses and / or by the application of heat and / or mechanical deformation and / or chemical adhesive bonds. Such a connection can serve at least essentially for fixing along the longitudinal direction or be intended for this purpose.

[0023] The fastening part and the wiper lip can thus be fixed relative to one another, in particular along their extent. This can be achieved entirely or partially by an end piece. The end piece can then be designed such that it blocks both the fastening part and the wiper lip with respect to movement along their extent out of the wiper arm. In a preferred embodiment, the end piece can be positively connected to the fastening part and the wiper lip, for example by at least one rib preferably formed on the end piece. The at least one rib can engage in recesses, in particular cutouts, in the fastening part and the wiper lip.

[0024] The end piece can be designed with a release function, which can be implemented via an actuation button on the end piece. In a modified embodiment, an actuation button can be formed on the wiper arm. The end piece and the wiper arm can then be pushed into one another and detachably connected.

[0025] If the end piece is mounted on the wiper arm, then in one possible design, the fastening part with the wiper lip can in principle be freely movable along its length, with the free movement being restricted by the end cap. A certain amount of play can be provided here, so that the fastening part with the wiper lip can move freely over a certain distance between a stop provided on the wiper arm and the end cap. The end piece can then be removed to replace the fastening part with the wiper lip.

[0026] The end piece can hold the mounting part to indirectly support the wiper lip during wiping. At the same time, the end piece can close the end so that the mounting part cannot be moved out of the wiper arm. The wiper lip is preferably firmly connected to the mounting part.

[0027] The fastening part can have a profile for receiving the wiper lip. Such a profile can have a head strip with recesses that increase elasticity or flexibility. The number and arrangement of these recesses can optimize the elasticity and flexibility. In particular, the local elasticity or flexibility can increase towards the outer end of the wiper arm. This can be achieved by providing transversely oriented recesses spaced apart from one another along the extension of the head strip, with the distance between adjacent recesses decreasing towards the outer end. Short description of the drawings

[0028] Preferred embodiments of the invention are explained in more detail in the following description with reference to the accompanying drawings, in which corresponding elements are provided with identical reference numerals. They show: Fig. 1 a wiper device, in particular for a motor vehicle, with a wiper arm and a wiper blade in a schematic, spatial representation according to a first embodiment; Fig. 2 the wiper arm of the Fig. 1 shown wiper device in a schematic, spatial representation according to the first embodiment; Fig. 3 an end piece of the Fig. 1 shown wiper device in a schematic, spatial representation according to the first embodiment; Fig. 4 a fastening part of the Fig. 1 shown wiper device in a schematic, spatial representation according to the first embodiment; Fig. 5 a wiper lip of the Fig. 1 shown wiper device in a schematic, spatial representation according to the first embodiment; Fig. 6 which in Fig. 1 shows a schematic, spatial representation of the wiper device shown, showing a situation during a change of the wiper blade; Fig. 7 the wiper arm of the Fig. 1 shown wiper device in a schematic, spatial representation and an excerpted representation of the fastening part to explain the design and functioning of the first embodiment; Fig. 8 the fastening part and the wiper lip of the wiper blade in an excerpted, schematic, spatial representation according to the first embodiment, wherein a possible design of a connection between the fastening part and the wiper lip is shown; Fig. 9 the wiper lip of the wiper blade in an excerpted, schematic, spatial representation according to the first embodiment, wherein a recess on the wiper lip serving for the connection is shown; Fig. 10 the fastening part and the wiper lip of the wiper blade in an excerpted, schematic, spatial representation according to the first embodiment, wherein a situation during the production of a connection between the fastening part and the wiper lip is shown; Fig. 11 the fastening part and the wiper lip of the wiper blade in an excerpted, schematic, spatial representation according to the first embodiment, wherein below Fig. 10 shows the possible design of the connection between the fastening part and the wiper lip; Fig. 12 the fastening part and the wiper lip of the wiper blade as well as an end piece in a schematic, spatial representation according to a second embodiment; Fig. 13 the fastening part and the wiper lip of the wiper blade as well as an end piece in a partial, schematic, spatial sectional view according to the second embodiment, wherein a possible design of a connection between the end piece and both the fastening part and the wiper lip is shown; Fig. 14 the wiper lip in a partial, schematic, spatial representation according to the second embodiment, wherein a recess for a possible design of the connection between the end piece and the wiper lip is shown; Fig. 15 the fastening part in an excerpted, schematic, spatial representation according to the second embodiment, wherein a recess for a possible design of a connection between the end piece and the fastening part is shown; Fig. 16 the end piece in a partial, schematic, spatial representation according to the second embodiment, wherein a possible design of ribs for a connection between the end piece and both the fastening part and the wiper lip is shown; Fig. 17 a wiper device in an excerpted, schematic, spatial representation according to a third embodiment, wherein a possible design of a connection between the end piece and the wiper arm is shown according to a snap-in connection. Fig. 18 a wiper device in a schematic, spatial representation according to a fourth embodiment, wherein a situation during assembly is shown; Fig. 19 which in Fig. 18 shows a schematic, spatial representation of the wiper device according to the fourth embodiment in the assembled state; Fig. 20 a fastening part in a schematic, spatial representation according to a possible embodiment and Fig. 21 that in Fig. 20 shows the fastening part in a bent state to illustrate an elasticity or bendability changing along the extension of the fastening part in an idealized representation. Embodiments of the invention

[0029] Fig. Figure 1 shows a wiper device 1 with a wiper arm 2 and a wiper blade 3 in a schematic, spatial representation according to a first exemplary embodiment. The wiper device 1 can be used in particular for a motor vehicle. Furthermore, Fig. 2 the wiper arm 2 which is in Fig. 1 shown wiper device 1 in a schematic, spatial representation according to the first embodiment.

[0030] The wiper device 1 comprises several components, including the wiper arm 2 and the wiper blade 3. The wiper blade 3 in turn comprises a fastening part 4, to which the wiper blade 3 is fastened to the wiper arm 2, and a wiper lip 5. The wiper arm 2 comprises an elongate receiving body 7 extending along a longitudinal extent 6. The receiving body 7 has a hollow profile 9 open at one end 8.

[0031] A fastening slot 10 extending along the longitudinal extension 6 is formed on the hollow profile 9. The fastening part 4 can be inserted into the fastening slot from the open end 8 along the longitudinal extension 6.

[0032] The wiper arm also has a mounting body 11 with a mounting eye 12. A shaft driven by an electric motor can be attached to the mounting eye 12.

[0033] Fig. 3 shows an end piece 18 of the Fig. 1 in a schematic, spatial representation according to the first embodiment. Furthermore, Fig. 4 the fastening part 4 of the Fig. 1 shown wiper device 1 in a schematic, spatial representation according to the first embodiment. Fig. 5 shows the wiper lip 5 of the Fig. 1 shown wiper device 1 in a schematic, spatial representation according to the first embodiment.

[0034] Fig. 6 shows the Fig. 1 in a schematic, three-dimensional representation, showing a situation during a replacement of the wiper blade 3. Here, the fastening part 3 with the wiper lip 5 can be pushed into or pulled out of the fastening slot 10 on the wiper arm 2 according to the double arrow 13 along the longitudinal extension 6. This allows for easy replacement of the wiper blade 3.

[0035] Fig. 7 shows the wiper arm 2 of the Fig. 1 in a schematic, spatial representation and a partial representation of the fastening part 4 to explain the design and functioning of the first embodiment. The fastening slot 10 is formed on a side 15 of the receiving body 7 of the wiper arm 2 facing the wiper lip 5.

[0036] When the wiper blade is mounted, a web 16 of the fastening part 4 extends through the fastening slot 10 of the hollow profile 9. In this exemplary embodiment, the fastening part 4 has a head strip 17 arranged inside the hollow profile 9 when mounted. The fastening part 4 engages behind the hollow profile 9 with its head strip 17 from the inside.

[0037] The end piece 18 is detachably connected to the end 8 of the receiving body 7. The end piece 18 connected to the receiving body 7 secures the fastening part 4 in the receiving body 7 against moving out along the longitudinal extension 6, i.e. with respect to a movement along the Fig. 6 shown double arrow 13. Depending on the design, a certain amount of play of the fastening part 4 relative to the end piece 18 may or may not be present.

[0038] Fig. 8 shows the fastening part 4 and the wiper lip 5 of the wiper blade 3 in an excerpted, schematic, spatial representation according to the first embodiment, wherein a possible design of a connection between the fastening part 4 and the wiper lip 5 is shown.

[0039] In this exemplary embodiment, the wiper lip 5 has a retaining strip 20 extending along the longitudinal extent 6. The retaining strip 20 can be inserted along the longitudinal extent 6 into a receptacle 21 of the fastening part 4. The retaining strip 20 and the fastening part 4 are then connected to one another at least by a positive connection. Additionally or alternatively, a chemical connection can also be realized between the wiper lip 5 and the fastening part 4. Thus, the wiper lip 5 and the fastening part can be reliably connected to one another.

[0040] Fig. 9 shows the wiper lip 5 of the wiper blade 3 in an excerpted, schematic, spatial representation according to the first embodiment, wherein a recess 23 serving for the connection is shown on the wiper lip 5. Fig. Figure 10 shows the fastening part 4 and the wiper lip 5 of the wiper blade 3 in an excerpted, schematic, spatial representation according to the first embodiment, showing a situation during the establishment of a connection between the fastening part 4 and the wiper lip 5. The effect of heat is illustrated by arrows 29. Furthermore, Fig. 11 the fastening part 4 and the wiper lip 5 of the wiper blade 3 in an excerpted, schematic, spatial representation according to the first embodiment, wherein below Fig. 10 shows the possible design of the connection between the fastening part 4 and the wiper lip 5.

[0041] The fastening part 4 is deformable on its long sides 24, 25. For example, as in Fig. 10, by applying heat 29, the fastening part 4 can be formed on the one hand on its long side 24 into the receptacle 21 of the retaining strip 20 and on the other hand on its long side 25 into a corresponding receptacle. This results in an indentation 22 on the long side 24. A corresponding indentation can be formed on the long side 25. The deformation of the fastening part can additionally or alternatively also be carried out mechanically, which in Fig. 10 is illustrated by a tool 34. Furthermore, a chemical bond can be additionally implemented. Thus, the wiper lip 5 is then fixed relative to the fastening part 4, particularly along the longitudinal extension 6.

[0042] Fig. 12 shows the fastening part 4 and the wiper lip 5 of the wiper blade 3 as well as an end piece 18 in a schematic, spatial representation according to a second embodiment. Fig. 13 the fastening part 4 and the wiper lip 5 of the wiper blade 3 as well as the end piece 18 in an excerpted, schematic, spatial sectional view according to the second embodiment, wherein a possible design of a connection between the end piece 18 and both the fastening part 4 and the wiper lip 5 is shown.

[0043] Fig. 14 shows the wiper lip 5 in a partial, schematic, spatial representation according to the second embodiment, wherein a recess 23 is shown on the wiper lip 5 for a possible design of the connection between the end piece 18 and the wiper lip 5. Furthermore, Fig. 15 the fastening part 4 in an excerpted, schematic, spatial representation according to the second embodiment, wherein a recess 26 is shown for a possible design of a connection between the end piece 18 and the fastening part 4. Fig. 16 shows the end piece 18 in an excerpted, schematic, spatial representation according to the second embodiment, wherein a possible design of ribs 28, 32, 33 for a connection between the end piece 18 and both the fastening part 4 and the wiper lip 5 is shown.

[0044] The fastening part 4 has a recess 26, 27 on its long side 24. In this embodiment, a rib 28 of the end piece 18 engages in the recess 26, 27, wherein in Fig. 13 and Fig. 16 only one rib 28 is provided on the longitudinal side 24. Furthermore, the fastening part 4 has longitudinal grooves 30, 31 extending along its longitudinal sides 24, 25, into which ribs 32, 33 of the end piece 18 engage.

[0045] Fig. 17 shows a wiper device 1 in an excerpted, schematic, spatial representation according to a third embodiment, wherein a possible design of a connection between the end piece 18 and the wiper arm 2 is shown according to a snap-in connection.

[0046] The end piece 18 can be connected to the receiving body 7 by means of the locking connection. For this purpose, the end piece 18 is inserted in the direction of arrow 39 at the open end 8 into the hollow profile 9 of the wiper arm 2. The end piece 18 has a connecting element 40, which in this embodiment is designed as a locking element 40. In the assembled state, the locking element 40 engages in a recess 41 formed in the hollow profile 9, as shown in Fig. 1 is shown.

[0047] Fig. Figure 18 shows a wiper device 1 in a schematic, spatial representation according to a fourth embodiment, showing a situation during assembly. Fig. 19 which in Fig. 18 shows a schematic, three-dimensional representation of the wiper device 1 according to the fourth exemplary embodiment in the assembled state. The end piece 18 and the fastening part 4 are not connected to one another. The fastening part 4 and the wiper lip 5 connected to the fastening part 4 can, if necessary, be moved back and forth slightly along the longitudinal extension 6 in the fastening slot 10, although the end piece 18 provides a captive lock.

[0048] Fig. 20 shows a fastening part 4 in a schematic, spatial representation according to a possible embodiment. Fig. 21 that in Fig. 20 shows the fastening part 4 in a bent state to illustrate an elasticity or bendability changing along the extension of the fastening part 4 in an idealized representation.

[0049] The fastening part 4 in this embodiment has a head strip 17 in which recesses 45A to 45G are provided, running transversely to the longitudinal extent 6. The recesses 45A to 45G are oriented in this embodiment at least approximately 90° to the longitudinal extent 6 of the head strip 17. A mean distance L between the recesses 45A to 45G decreases towards the end 8 of the hollow profile 9. For example, a distance L1 between the recesses 45A, 45B arranged closer to the end 8 is smaller than a distance L2 between the recesses 45F, 45G arranged further away from the end 8. This results in a variable bendability along the longitudinal extent 6, which in Fig.21 is illustrated.

[0050] The invention is not limited to the described embodiments. 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 198 54 307 A1

[0002]

Claims

[1] Wiper device (1), in particular for a motor vehicle, with a wiper arm (2) and a wiper blade (3), wherein the wiper blade (3) has a fastening part (4) to which the wiper blade (3) can be fastened to the wiper arm (2), and a wiper lip (5), characterized by that the wiper arm (2) has an elongate receiving body (7) extending along a longitudinal extent (6), which has a hollow profile (9) open at one end (8) of the receiving body (7), and that a fastening slot (10) running along the longitudinal extent (6) is provided on the hollow profile (9), into which slot the fastening part (4) can be inserted from the open end (8) along the longitudinal extent (6). [2] Wiper device according to claim 1, characterized by that the fastening slot (10) is formed on a side (15) of the receiving body (7) of the wiper arm (2) facing the wiper lip (5). [3] Wiper device according to claim 1 or 2, characterized bythat a web (16) of the fastening part (4) extends through the fastening slot (10) of the hollow profile (9) and that the fastening part (4) engages behind the hollow profile (9) with a head strip (17) of the fastening part (4) arranged in the interior of the hollow profile (9). [4] Wiper device according to one of claims 1 to 3, characterized by that an end piece (18) is provided which can be detachably connected to the receiving body (7) at the end (8) of the receiving body (7), and that the end piece (18) connected to the receiving body (7) secures the fastening part (4) in the receiving body (7) against moving out along the longitudinal extent (6) in the mounted state. [5] Wiper device according to claim 4, characterized by , a) that the end piece (18) can be connected to the receiving body (7) by means of a snap-in connection and / or b) that the end piece (18) has a connecting element (40), in particular a locking 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] Wiper device according to claim 4 or 5, characterized by , a) that the fastening part (4) has a recess (26, 27) on at least one of its longitudinal sides (24, 25) into which a rib (28) of the end piece (18) engages, and / or b) that the fastening part (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 a rib (32, 33) of the end piece (18) engages. [7] Wiper device according to one of claims 1 to 6, characterized bythat the wiper lip (5) has a retaining strip (20) extending along the longitudinal extent (6), that the retaining strip (20) can be inserted along the longitudinal extent (6) into a receptacle (21) of the fastening part (4) and that the retaining strip (20) and the fastening part (4) are connected to one another by a positive connection and / or a chemical connection. [8] Wiper device according to claim 7, characterized by that the fastening part (4) is deformable on at least one of its longitudinal sides (24, 25), in particular by the action of heat and / or mechanically deformable such that the fastening part (4) is shaped on its longitudinal side (24, 25) into the receptacle (21) of the retaining strip (20). [9] Wiper device according to claim 4 or 5, characterized by that the end piece (18) and the fastening part (4) are not connected to each other. [10] Wiper device according to one of claims 1 to 9, characterized bythat the fastening part (4) has a head strip (17) and that recesses (45A - 45G) extending transversely to the longitudinal extent (6) are provided in the head strip (17), wherein a mean distance (L) between the recesses (45A - 45G) decreases in the assembled state towards the end (8) of the hollow profile (9).

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