FR2854852A1 - Windscreen wiper blade and blade fastening device comprises blade carried by element and fastening device, fixed to wiper arm, comprising fastening parts able to move relative to each other - Google Patents

Abstract

The wiper blade (10) comprises a wiping blade carried by an element and a fastening device (16) so as to be fixed to a wiper arm. The fastening device comprises fastening parts (32) able to move relative to each other. The fastening parts engage with the wipe blade material when they are connected to each other and realize a fixing locked in sliding between the fastening device and the wiper blade and between the wiper blade and carrying element.

Description

Field of the invention

  The present invention relates to a wiper blade for wiping windows or windows, in particular motor vehicle windows, comprising a wiping blade, a carrier element for the wiping blade and a fastening device for being fixed to a wiper arm, the attachment device comprising movable attachment parts relative to each other and which can be connected to each other.

  STATE OF THE ART In the case of wiper blades of the type defined above, a carrier element must ensure that the application pressure of the wiper blade leaving the wiper arm is distributed as evenly as possible. ice against ice for the entire wiping field traversed by the wiper blade. Thanks to the bending of the unsolicited support element, that is to say when the wiper blade is not applied against the window, the ends of the wiper blade applied completely against the window when the wiper blade is working, are then urged by the carrier element stretched against the window even if the radii of curvature of the spherical bent windscreen change for each position of the wiper blade. The curvature of the wiper blade must therefore be slightly greater than the greatest curvature measured in the wiping field of the window to be wiped. The carrier element thus replaces the complicated support structure with lifting beams of the usual wiper blades.

  The present invention corresponds to the type of wiper blade known according to document DE-OS 100 36 115. This known wiper blade consists of a carrying element, elongated, made of an elastic material with a blade of elastic wiping like rubber connected to this support element by the head and having a wiping lip to apply against the ice; the support rail and the head are housed in a profiled bar open on the side of the wiping lip and the carrier element as well as the profiled bar are curved concave in the direction of the wiping blade. The carrier element and the profiled bar include a fastening device for the wiper arm; this device is made up of two separate parts that hang together. To prevent the fastening device from sliding relative to the support element and to the profiled bar, the support element and the profiled rail have cavities in which ribs are formed formed on the separate parts of the device. attaches, when the assembly is assembled. But for this it is necessary to make or cut grooves in the carrier element at the attachment device, which weakens the carrier element in this extremely sensitive area. In addition, this requires an additional operation which increases the manufacturing process.

  Description and advantages of the invention The present invention relates to a wiper blade of the type defined above, characterized in that the attachment parts cooperate with the material of the wiping blade when they are connected. to one another and provide a fastening locked in sliding on the one hand between the fastening device and the wiping blade and on the other hand between the wiping blade and the carrier element.

  The wiper blade according to the invention has the advantage that the support element has no notch in which the fastening device would rest. The axial attachment of the attachment device 15, that is to say in the longitudinal direction of the wiper blade, is effected by the intimate cooperation of the rubbery material of the wiper blade and of the regions of the wiper device. fixation. This avoids weakening the carrier element in this area exposed to the greatest bending stresses during the wiping operation. In addition, this gives some possibility of variation in the longitudinal direction of the wiper blade to position the fastening device since there is no position determined by predefined cavities.

  According to another advantageous characteristic, a clamping effect is created which increases the connection between the fastening device and the wiping blade if the fastening device has claw-shaped bars which can surround areas of the blade wiping and fitting into it. These bars preferably have an internal contour allowing the formation of cutting edges. These cutting edges increase the partial pressure exerted on the wiping blade and per30 put a simple assembly without the need to exert a significant effort. The stability of the fastening device can be increased by several cutting edges which are preferably double cutting edges in pairs.

  The mounting is simplified if the fastening device is made up of fastening pieces provided with fastening means and complementary fastening means which hang on to each other in the assembled position and fix the fastening pieces. If each attachment piece comprises attachment means and additional attachment means, thanks to an appropriate arrangement of these attachment means, the attachment parts can be identical, which results in a reduction considerable the number of parts and thus the cost.

  If the fasteners are hingedly connected to each other, preferably by a hinge formed by a hinge film, the two fasteners are loosely connected.

  The connection can be provided, in particular in the case of an elongated fastening device, on a front face and in the case of a fastening device rather of a certain height, on a long side or upper side ( for example at the level of the deflector).

  The fastening device according to the invention is characterized in that it is constituted by a simple plastic part, preferably an injected part, allowing very great freedom of shape. It is also possible to use the same attachment device for different ba15 wiper strips.

  Drawings The present invention will be described below in more detail with the aid of four exemplary embodiments of a wiper blade shown in the accompanying drawings in which: - Figure 1 is a partial perspective view of a wiper blade with an open attachment device corresponding to a first embodiment, - Figure 2 shows the attachment device of Figure l in the closed state, - Figure 3 shows a front view of the attachment device of fi25 gure 1, - Figure 4 is a side view of the attachment device of Figure 2, - Figure 5 is a section along the line VV of Figure 4, - Figure 6 is a section along line VI-VI of Figure 4, - Figure 7 shows a fastening device according to Figure 1, - Figure 8 shows the fastening parts of a fastening device of Figure 1 in top view at an angle, - Figure 9 shows a second embodiment of a salt wiper blade in Figure 1, the attachment device is not yet in place, - Figure 10 shows a wiper blade according to Figure 9 on which the attachment device is placed, - Figure 1 1 shows a wiper blade corresponding to FIG. 10 when the fastening device is practically closed, - FIG. 12 is a side view from below of the fastening device of FIG. 9, - FIG. 13 is a sectional view of a fastening device corresponding to a third exemplary embodiment according to FIG. 5, - FIG. 14 shows a fourth exemplary embodiment of a fastening device according to FIG. 6, - FIG. 15 shows a wiper blade.

  Description of embodiments

  FIG. 15 shows a wiper blade 10 according to the invention with a wiping blade 12, a carrying element 14 shown for example in section in FIG. 5 and a fastening device 16 to be fixed to a wiper arm 18 via a hinge pin 20. The wiper arm 18 makes it possible to drive the wiper blade 10 on the window or window 22 to be wiped; this glass is represented in broken lines in FIG. 15. The wiper blade 10 is not completely pressed against the glass 22 in FIG. 15 and only the ends 24 of the wiping blade are applied against the window 22 while at the level of the attachment device 16 the wiping blade is still spaced from the window 22. If the wiper arm 18 exerts the application force 20 provided on the attachment device 16 , the wiping blade 12, under the effect of the tension of the carrying element 14, is applied against the glass 22. The tension thus exerted by the carrying element 14 ensures a uniform application pressure over the entire length of the wiping blade even if the curvature of the glass varies during the wiping movement.

  The following description relates to the various exemplary embodiments whose identical or corresponding elements bear the same references.

  Figures 1 to 8 show a first embodiment of a wiper blade 10 according to the invention and its attachment device 30 16. As is clearly seen in Figures 5 and 6, the wiper blade 12 comprises a head 24 connected via a tilting spacer 26 to a wiping lip 28. The head 24 comprises a hollow channel 30 receiving the carrier element 14 in the form of an elastic rail.

  The wiping blade 12 thus surrounds the entire periphery of the porous element 14 when the assembly is seen in section.

  The fastening device 16 consists of two fastening parts 32 shown separately in Figure 1 just before being connected; in Figure 2 these parts are shown in the assembled position just after assembly. To connect the two parts 32 they are brought together in the direction of arrow 34 (Figure 3).

  Figures 5 and 6 show two sections of the fastening device 16 once assembled. The attachment pieces 32 surround the upper surface 36 of the head 24 and push this head at least partially in the direction of the carrier element 14 as can be seen clearly in FIG. 6. The attachment device 16 thus cooperates with the material of the wiping blade 12 to produce on the one hand a connection which does not slip between the fastening device 16 and the wiping blade 12 and on the other hand 10 between the wiping blade 12 and the carrier element 14. The friction force generated in these partial pressure zones effectively prevents any axial sliding of the fastening device 16 relative to the wiping blade 12 and likewise this avoids axial sliding of the wiping blade 12 relative to the carrier element 14.

  For this, the fastening pieces 32 have bars 38 in the form of claws which are applied around parts of the wiping blade 12 when they are connected to receive the wiping blade 12 and finally push back at least partially. the material of the wiping blade 12 at this location. As shown in FIGS. 7 and 8, the bars 20 rettes 38 comprise at least and in this case six cutting edges 40. The cutting edges 40 are provided on the edges delimiting the bars 38 and these double cutting edges are associated in pairs .

  The attachment pieces 32 each have a head part 42 and a foot part 44, the bars 38 being produced in the foot zone 25 44. The head part 42 comprises at least one surface 46 which bears against a corresponding surface 46 of the complementary attachment piece 32 in the assembled position. Latching means 48 are provided on the surface 46 to cooperate with complementary latching means 50 of the complementary attachment piece 32. The latching means 48 for this purpose comprise two elastic tabs 52 which move apart from the surface 46 and can move elastically relative to each other. At the end of the elastic lugs 52 opposite the surface 46, each elastic lug 52 has an undercut 54 functioning as a hooking means 48 due to the elasticity of the lugs 52.

  The complementary attachment means 50 of the corresponding attachment piece 32 has the shape of an orifice 56 adapted to that of the elastic tabs 52; the rear edge 58 of the orifice cooperates with the undercut portion 54 thus constituting an additional attachment means. In the assembled state, as it clearly appears in FIG. 5, the hooking means 48 are housed in the complementary hooking means 50, thus making a hook connection.

  According to FIGS. 7 and 8, each attachment piece 52 comprises both a hooking means 48 in the form of elastic tabs 52 and a complementary hooking means in the form of an orifice 56.

  The attachment means 48 and the additional attachment means 50 are symmetrical so that all the attachment pieces 32 can be identical and by their assembly, the attachment device 16 is obtained.

  To be able to cooperate with the wiper arm 18, the attachment pieces 32 have a cavity 60, here in the form of a bore.

  Figures 9 to 12 show a second embodiment. In this example, the attachment pieces 32 are connected by an articulation 62. This articulation 62 is provided on the front face of the attachment pieces 32, being produced in the form of an articulation by a film hinge. For this, the two attachment parts 32 made of plastic, for example as injected parts, are connected to each other by a connection by the material formed by a thin film.

  To pass the fastening parts 32 thus connected, in the open state, over the head 24 of the wiping blade 12, during assembly, the foot parts 44 have cutouts 64. These cutouts are inclined relative to the longitudinal direction of the attachment pieces 32 so that in the open state (FIG. 9) there is an opening whose shape is adapted to that of the head portion 24.

  If, as shown in the embodiment of FIG. 13, the articulation 62 is produced on the upper side 66, the cutouts 64 are unnecessary. The bars 38 come to take over the head part 42 for mounting and surround the head part once the hooking means 48 and the complementary hooking means 50 hooked to each other. The articulation 62 appears clearly here as a hinge with a film hinge provided with a thin spacer 70 allowing the articulation movement.

  The fastening device 16 presented in FIG. 13 differs from the fastening devices 16 described above in that in this case the head part 42 is in the form of a deflector 68.

  The exemplary embodiment of FIG. 10 presents a wiper blade 10, the support element 14 of which is formed by two elastic rails 72. The attachment pieces 32 here surround the head portion 24 of the blade wiping 12 and cooperate with the material of the wiping blade 12 to push the material of this wiping blade 12 and thus make a connection which does not risk slipping both between the fastening device 16 5 and the wiping blade 12 as well as between the wiping blade 12 and the carrier element 14 in the form of two longitudinal rails 72.

  The embodiments of the wiper blade and of the attachment device according to the invention are not limited to the examples presented.

  Thus, the embodiments are not limited to those of a single cavity 60 l0 for cooperation with the wiper arm. One can also provide more complex structures with one or more axes. The number of spacers and cutting edges is also not limited to that of the examples presented. Similarly, it is not essential that the hollow channel 30, as shown, be completely closed. Depending on the type of embodiment of the wiping blade 12, it is possible to provide more or less large housings or even a complete longitudinal groove.

Claims (9)

  1) Wiper blade (10) for wiping windows or windows, in particular motor vehicle windows, comprising a wiper blade (12), a carrier element (14) for the wiper blade (12) and a fastening device (16) for being fixed to a wiper arm (18), the fastening device (16) comprising fastening parts (32) movable with respect to the and which can be connected to each other, characterized in that the attachment pieces (32) cooperate with the material of the wiping blade 10 (12) when they are connected to each other the other and provide a fastening locked in sliding on the one hand between the fastening device (16) and the wiping blade (12) and on the other hand between the wiping blade (12) and the element carrier (14).   2) Wiper blade according to claim 1, characterized in that the attachment parts (32) comprise bars (38) in the form of claws which push the material of the wiping blade (12) when the fastening parts (32) are connected together. 3) Wiper blade according to claim 2, characterized in that the bars (38) have an inner contour provided with at least one cutting edge (40).   4) Wiper blade according to claim 3, characterized in that it comprises several cutting edges (40) and these are provided in pairs.   5) Wiper blade according to one of claims 2 to 4, characterized in that the attachment parts (32) have a head part (42) and a foot part (44), the part of head (42) has hooking means (48) and complementary hooking means (50), and the bars (38) are provided in the foot part (44).   6) Wiper blade according to claim 1, characterized in that the attachment pieces (32) each time comprise a hooking means (48) and a complementary hooking means (50) provided on surfaces (46) of the attachment pieces (32) facing one another and which no longer appear once the assembly has been carried out.   7) Wiper blade according to claim 1, characterized in that the attachment parts (32) each comprise a hooking means (48) 10 and a complementary hooking means (50), the parts d 'fastener (32) being identical.   8) Wiper blade according to claim 1, characterized in that the attachment pieces (32) are connected to each other by a hinge (62).   9) Wiper blade according to claim 8, characterized in that the articulation (62) is a film hinge.   10) Attachment device (16) for a wiper blade (10) comprising attachment parts (32) movable relative to each other and capable of being connected to one another other, characterized in that the attachment pieces (32) are produced according to any one of claims 2 to 9.