CN118182394A - Wiper blade, in particular for a motor vehicle - Google Patents

Abstract

A wiper blade (10), in particular for a motor vehicle, is proposed. The wiper blade comprises at least one base element (23) with a longitudinal extension (L) and at least one spring strip (16), and comprises a wiper strip (12). According to the invention, a replacement element (25) is provided which comprises the wiper strip (12) and the stabilizing element (14), can be pushed into the base element (23) along the longitudinal extension (L), and has at least one strip fixing element (42) for locking on the base element (23) along the direction of the longitudinal extension (L).

Description

Wiper blade, in particular for a motor vehicle

Technical Field

The present invention relates to a wiper blade, in particular for a motor vehicle, according to the preamble of the independent claim.

Background

A large number of wiper blades for motor vehicles are known, which have a base element with at least one spring strip having a longitudinal extension and a wiper strip. Furthermore, it is known for such wiper blades to replace the wiper strip. In this case, it is problematic that the wiper strip is not correctly seated in the wiper blade when the wiper strip is replaced, so that only unsatisfactory wiping results are obtained after replacement of the wiper strip.

Disclosure of Invention

The wiper blade according to the invention, which has the features of the independent claim, has the following advantages: a replacement element is provided comprising a wiper strip and a stabilizing element, which replacement element can be pushed into the base element along the longitudinal extension and has at least one strip fixing element for locking in the direction of the longitudinal extension. In this way, the wiper strip can be easily replaced without compromising the wiping result.

Advantageous developments and improvements of the features specified in the independent claims result from the measures recited in the dependent claims.

In a simple, low-cost and thus advantageous embodiment, the strip-holding element is configured as an opening or recess, in particular arranged in the stabilization element.

It is particularly effective and therefore advantageous for the base element to have a base fixing element which interacts with the strip fixing element.

In this case, it is particularly effective and therefore advantageous for the base fastening element to interact at least in a form-locking manner with the strip fastening element.

In a simple, low-cost and thus advantageous embodiment, the base fastening element is embodied here as a pin or a square which engages into an opening or recess of the strip fastening element.

Furthermore, it may be seen as advantageous if the base fixing element has a handle, in particular a release button, for releasing the locking, since an easy exchange of the refill is thereby ensured.

In this case, it can be seen as advantageous if the handle is arranged on the upper side facing away from the replacement element, since this facilitates handling during the replacement of the replacement element.

In a simple, cost-effective and thus advantageous embodiment, at least one end cap is provided, which substantially encloses the base element along its longitudinal extension, and the handle is configured as a part of the end cap.

It is also simple, inexpensive and therefore advantageous if the wiper blade has a wiper strip and the handle is formed as part of the wiper strip.

The replacement element according to the invention for a wiper blade has the following advantages: the wiper strip and the stabilizing element are constructed as separate components and are fixedly connected to one another. Thereby enabling easy replacement of the replacement element.

Drawings

Embodiments of the present invention are illustrated in the accompanying drawings and explained in detail in the following description.

Wherein:

fig. 1 shows a wiper blade according to the invention in a schematic side view;

Fig. 2 shows an installed end cap of a wiper blade according to the invention during the installation of a replacement element;

Fig. 3 shows an exploded cross-sectional view of one end of a wiper blade according to the invention;

FIG. 4 shows one end of the base member with an end cap during installation;

Fig. 5 shows one end of the replacement element; and

Fig. 6 shows one half of a wiper blade according to the invention.

Detailed Description

Fig. 1 shows a schematic side view of a wiper blade 10 according to the invention.

The wiper blade 10 according to the invention has a longitudinal extension L and comprises a wiper strip 12 and a stabilizing element 14. The stabilizing element 14 is fastened to a spring strip 16 of the wiper blade 10.

The spring strip 16 is made of flat strip steel. In a variant of the invention, however, the spring rail 16 can also consist of plastic. The spring rail 16 is formed in two parts and therefore comprises two spring elements arranged parallel to one another, each of which is formed from a flat strip steel and between which a gap a or a play is provided.

The spring rail 16 is pre-bent in the relaxed state, i.e. in the absence of force, in the form of a banana: so that the wiper strip 12 of the installed wiper blade 10 lies along substantially its entire longitudinal extension L on the curved window pane to be wiped.

A deflector strip 18 is arranged above, and thus on the side of the spring strip 16 facing away from the wiper strip 12 in cross section. The deflector strip 18 is formed here from an elastomer.

Between the two ends 20 of the longitudinal extension L, a securing means 22 for securing the wiper blade 10 to a wiper arm of a motor vehicle is arranged approximately centrally. The fastening means 22 are integrally formed from plastic and are injection molded directly onto the spring rail 16. In a variant of the invention, the holding element made of metal is arranged, for example welded or stamped, on the spring rail 16. These holding elements can interact with one another in a complementary manner. The fastening means 22 can likewise be welded or otherwise fastened as a plastic part to the spring rail 16 in a form-locking and/or force-locking manner.

The spring strip 16 forms a base element 23 (fig. 3) together with the fastening means 22 and the guide strip 18.

At least one liquid channel is arranged in the base element 23. The liquid channel is used to carry cleaning liquid inside the base element 23. The liquid channel, which is not shown here for reasons of simplicity, is arranged inside the guide strip, in particular integrally formed with the guide strip 18.

On the ends 20 with respect to the longitudinal extension L, end caps 24 made of plastic are arranged, respectively, which substantially close the wiper blade 10 with respect to the longitudinal extension L thereof.

At least one of the end caps 24 has a nozzle as an outlet device, through which a cleaning fluid for cleaning the window glass can be discharged from the fluid channel. The liquid channel thus continues as a guide channel from the guide strip 18 into the end cap 24.

Fig. 2 shows an end 20 of a wiper blade 10 according to the invention during the installation of a replacement element 25.

The wiper blade 10 comprises a wiper strip 12 and a stabilizing element 14 which is fastened to a spring strip 16.

The spring strips 16 are provided with heating means. The heating means are applied here as a foil to the spring strips 16, but are not depicted here for the sake of simplicity. In a variant of the invention, the heating device can also be provided alternatively or additionally in the guide strip 18 and/or the fastening means 22.

The stabilizing element 14 is formed from plastic, in particular integrally, and is fixedly connected to the wiper strip 12. This can be done, for example, by ultrasonic welding, adhesive bonding or force-fitting and/or form-fitting connections.

The wiper strip 12 is clamped in this case by the holding element in the manner of a clip by the stabilizing element 14, so that a form-locking connection is produced. As an addition or alternative, a force-fitting connection can also be provided here.

The wiper strip 12 and the stabilizing element 14 are constructed as separate components, fixedly connected to one another and together form a replacement element 25. The stabilizing element 14 has a higher modulus of elasticity than the wiper strip 12, so that the stabilizing element 14 is stiffer than the wiper strip 12 and thereby stabilizes it in the longitudinal direction L.

The deflector strip 18 is fastened to the upper side of the spring strip 16 facing away from the replacement element 25.

The wiper strip 12 itself comprises a wiper lip 26 which, in operation, rests on the window pane to be wiped and, when moving on the window pane, scrapes moisture and dirt off the window pane. Furthermore, the wiper strip 12 comprises a head part 28 for fastening the wiper strip 12 to the stabilizing element 14.

The wiper lip 26 is connected to the head part 28 by means of a tilting tab 30. The connection is constructed as follows: the wiper lip 26 can be tilted relative to the head part 28 by means of the tilting web 30, so that in operation, when moving transversely to the longitudinal direction L, the wiper lip 26 is pulled over the window pane to be wiped.

The wiper strip 12 is composed of a relatively flexible material, typically a natural rubber-based elastomer or EPDM.

When the wiper blade 10 is mounted, for example, the head part 28 is pushed into the stabilizing element 14 and is then fastened to the stabilizing element 14, so that the replacement element 25 is produced.

For example, the stabilizing element 14 can be pressed at least in sections after insertion of the head part 28 for fixing the wiper strip 12. In one variant, an at least segmented, material-locking, for example welded or glued, connection can also be established after insertion.

The replacement element 25 can be pushed into the base element 23 and thus into the base element 23. The base element 23 has fixing means 36 for this purpose. In the present exemplary embodiment, the fastening means are formed by a gap a or a play in the two-part spring strip 16, into which the T-shaped holding section 37 of the stabilization element 14 can be inserted. The fastening means 36 is provided with an insertion aid for this purpose. The insertion aid is formed, for example, by the expansion of the distance a in the spring rail 16, in particular by a groove in the region of the end 20Is formed such that the T-shaped holding section 37 of the replacement element 25 can be easily pushed into the spring rail 16. In a variant, however, guide means can also be provided in the end cap 24, which guide the holding section 37 or the replacement element 25 into the correct position on the base element 23, for example in the direction of the distance a.

The end cap 24 has an insertion opening 40 which is arranged in correspondence with the securing means 36. In the present embodiment, the insertion opening 40 is arranged along the longitudinal extension L in alignment with the spacing a of the spring strips 16, so that the end cap 24 can remain on the rest of the base element 23 and does not have to be removed when the replacement element 25 is inserted.

Fig. 3 shows an exploded view in cross section of a wiper blade 10 according to the invention. The replacement element 25 comprises the wiper strip 12 and the stabilizing element 14 of the wiper blade 10 according to the invention. The securing means 22 are not depicted here for reasons of simplicity.

The stabilizing element 14 has approximately the same length along the longitudinal extension L as the wiper strip 12 and the spring strip 16.

In a variant of the invention, however, the spring strip 16 can also be slightly longer than the stabilizing element 14.

The wiper strip 12 is fastened with its head part 28 to the stabilizing element 14 such that the replacement element 25 has a lower stiffness than the spring strip 16, but a higher stiffness than the wiper strip 12 without the stabilizing element 14.

The replacement element 25 is formed at least in two parts and more precisely at least of the wiper strip 12 and the stabilizing element 14.

The spring rail 16 has a distance a and the stabilization element 14 has a holding section 37 as a securing means 36, which forms a connection between the stabilization element 14 and the spring rail 16.

The stabilizing element 14 is provided on its underside (which in the installed position faces the wiper strip 12) with a fastening element, which is embodied, for example, as a clip, adhesive layer or guide channel and is provided for fastening the wiper strip 12.

The stabilization element 14 has a holding section 37 on its upper side, which is embodied in a T-shape. The vertical base section of the T-shaped holding section 37 is approximately as wide as the distance a in cross section, and is minimally smaller than this distance a. The transverse beam of the T-shaped holding section 37, which is horizontal in cross section, is considerably wider in cross section than the distance a.

The stabilizing elements 14 are identical in cross section over the entire length. In a variant, a form-locking element for locking the replacement element 25 in the longitudinal direction can also be provided.

The end cap 24 has an insertion opening 40. The insertion opening 40 is rectangular in shape and is arranged in the outermost wall of the end cap 24 along the longitudinal extension L. The insertion opening 40 is formed in a shape-matched manner with the holding section 37, and thus rectangular in this case. In a variant of the invention, however, the insertion opening 40 can also be formed oval or circular.

Fig. 4 shows an end 20 of a wiper blade 10 according to the invention during the installation of a replacement element 25.

The wiper strip 12 is fixedly connected to the stabilizing element 14 and forms the replacement element 25, the replacement element 25 having a strip fixing element 42.

The strip fixing element 42 is embodied here as a recess in the replacement part 25, in particular as a recess in the stabilizing element 14. The recess is essentially square in particular and extends completely through the holding section 37 of the stabilization element 14. In a variant of the invention, however, the recess can also extend only partially through the holding section 37. For example, only rectangular, polygonal, circular or oval recesses are provided as strip fastening elements 42 or as recesses in the replacement part 25 on the upper side of the stabilizing element 14 facing away from the wiper strip 12, in particular in the holding section 37. The strip fixing element 42 can also be configured as a lateral recess in the stabilization element 14.

In the extension of the air guide element 18, an end cap 24 is arranged, which encloses the wiper blade 10 in the longitudinal direction L. A base securing element 44 is arranged on the end cap 24 forming part of the base element 23.

The base fastening element 44 is in this case configured as a one-sided, fastened web with a free end, which forms a handle 46 on the upper side of the wiper blade 10 facing away from the wiper strip 12.

On the inner side of the handle 46, which is not shown here, a fitting element is arranged, which is formed in a form-fitting manner with the strip-fixing element 42 and locks the replacement element 25 in the fixing position in the installed position, in order to prevent a displacement in the longitudinal direction L, so that the replacement element 25 is locked with respect to the base element 23.

In this case, a cutout can be provided in addition, which secures the web of the base securing element 44 when the fitting element is in the securing position of the base securing element 44.

When the replacement element 25 is mounted, it is pushed into the base element 23 in the longitudinal direction L. The handle 46 can then be actuated, so that the engagement element, which is embodied, for example, as a square, engages in the square recess of the strip-holding element 42. In this fixing position, the web of the base fixing element 44 is then fixed by means of the cutout.

In a variant of the invention, the web of the base fastening element 44 of this type is preloaded in the direction of the replacement element 25, so that the square or pin of the base fastening element 44 slides along the holding section 37 during the insertion and engages into the strip fastening element 42 by preloading when the strip fastening element 42 is in the fastening position.

Depending on the construction of the base fixing element 44, the connecting plate must be lifted if necessary in order to release the connection and thus to replace the replacement element 25.

The base fixing element 44 can be arranged at any position along the longitudinal extension L of the wiper blade 10. The base fixing element can be arranged as shown here on an end cap 24 which has an insertion opening 40 through which the replacement element 25 is inserted into the base 23. In a variant, it can also be arranged on the side facing away from the insertion opening 40.

In fig. 5, the end of the replacement element 25 is shown in a variant with respect to the previous embodiment. The strip fastening element 42 is not embodied here as a recess, but rather as a projection. As in the previous embodiment, the strip-fixing element 42 is arranged on the holding section 37 of the stabilizing element 14 supporting the wiper strip 12. The projection projects from the holding section 37 in the direction of the side facing away from the wiper strip 12 and has a stop surface 46.

The stop surface 46 is directed in this case in the direction of the end of the longitudinal extension of the displacing element 25. Which stop surface extends transversely to the longitudinal extension L of the replacement element 25. Such a stop surface 46 can interact with a square-shaped region or wall of the base fastening element 44 in such a way that the region of the base fastening element 44 is locked by the stop 46 to the replacement element 25.

On the side opposite the stop surface 46 in the longitudinal direction L, a sliding aid surface 48 is arranged. The sliding surface 48 is formed in a ramp-like manner, i.e., obliquely upward, in the direction of the stop surface 46. The sliding-aid surface 48 is thus designed and arranged in such a way that, when the refill 25 is pushed into the base 23, the locking element slides up on the sliding-aid surface 48 and springs back again downwards when the refill 25 has reached the desired fastening position, so that the stop surface 46 prevents a sliding out.

In addition to this, the locking element can be stressed by an upward sliding movement on the inclined sliding surface 48, so that the locking element springs downward in the fixed position after passing over the sliding surface 48. This can be achieved by: the locking element is arranged on a sprung web which is deflected by the sliding of the locking element on the sliding aid surface 48.

Fig. 6 shows one side of a wiper blade 10 according to the invention in a variant. The securing means 22 for securing the wiper blade 10 to a wiper arm, not shown here, is arranged approximately centrally along the longitudinal extension L of the wiper blade 10.

The base element 23 (fig. 2) with the deflector strip 18 and the end cap 24 has a base securing element 44. At the end cap 24, the insertion opening 40 is arranged on the outer wall, through which the replacement element 25 (fig. 4) is inserted. Only the wiper strip 12 can be seen in fig. 6, since the remaining elements of the replacement element 25 are hidden.

The base fastening element 44 with the handle 46 is formed here as a part of the deflector strip 18 along the longitudinal extension L.

The base securing element 44 is disposed between the securing means 22 and the end cap 24. In a variant of the invention, the base fastening element 44 can also be arranged inside the deflector strip 18.

If the base fixing element 44 is arranged inside the guide strip, the handle 46 can, for example, be configured only as a marked area of the surface of the guide strip 18, so that the user can operate the base fixing element 44 by pressing on the marked position of the guide strip 18.

The base securing element 44 is desirably configured such that: the locked state of the replacement element is released when the handle 46 is manipulated, such as when a button forming the handle 46 is pressed. This can be achieved in a simple manner by: the locking element of the base fixing element 44 is placed in the release position with respect to the strip fixing element 42 by manipulation of the handle 46. For example, a web can be provided in the end cap 24, which web is arranged in at least one side wall 48 of the end cap 24. The connecting plate then has a free lower end. A locking wall, which is arranged approximately parallel to the outermost wall of the end cap 24, is provided on this web as a locking means, which engages in the strip fixing element 42. In this case, for example, lateral recesses can be provided as strip fastening elements 42 in the replacement element 25 or in the stabilization element 14 of the replacement element 25. In order to release the locked state between the replacement element 25 and the base element 23, the free end of the connecting plate, which here serves as a handle 46, is lifted up, so that the locking wall is pulled out of the strip-holding element 42, whereby the locked state is released.

Claims (10)

1. Wiper blade (10), in particular for a motor vehicle, comprising at least a base element (23) having a longitudinal extension (L) and having at least one spring strip (16) and a wiper strip (12), characterized in that a replacement element (25) comprising the wiper strip (12) and a stabilizing element (14) is provided, which can be pushed into the base element (23) along the longitudinal extension (L), and has at least one strip fixing element (42) for locking onto the base element (23) along the direction of the longitudinal extension (L).

2. Wiper blade (10) according to claim 1, characterized in that the strip fixing element (42) is designed as an opening, recess or projection, in particular arranged in the stabilizing element (14).

3. Wiper blade (10) according to one of the preceding claims, characterized in that the base element (23) has a base fixing element (44) which cooperates with a strip fixing element (42).

4. A wiper blade (10) according to claim 3, characterized in that the base fixing element (44) interacts at least positively with the strip fixing element (42).

5. The wiper blade (10) as set forth in claim 4, wherein the base securement element (44) includes a pin or square that is inserted into an opening or recess of the strip securement element (42).

6. Wiper blade (10) according to one of the claims 3 to 5, characterized in that the base fixing element (44) has a handle (46), in particular a release button, for releasing the lock.

7. The wiper blade (10) according to claim 6, characterized in that the handle (46) is arranged on an upper side facing away from the replacement element (25).

8. Wiper blade (10) according to claim 6 or 7, characterized in that at least one end cap (24) is provided and that the handle (46) is configured as part of the end cap (24), wherein the end cap substantially encloses the base element (23) along its longitudinal extension (L).

9. The wiper blade (10) according to claim 6 or 7, characterized in that at least one spoiler (18) is provided and that the handle (46) is configured as a part of the spoiler (18).

10. The replacement element (25) for a wiper blade (10) according to one of the preceding claims, characterized in that the wiper strip (12) and the stabilizing element (14) are constructed as separate components and are fixedly connected to one another.