FR2976880A1 - WIPER SYSTEM - Google Patents

Abstract

A wiper system (100) having a wiper blade (110) with a hinge (115) comprising: - a substantially blade-shaped wiper arm (130) for installing the wiper blade; wiper (110), - a coupling member (135) for attaching the wiper arm (130) to a wiper shaft (125), a spring member (140) for exerting a force thrust on the coupling member (135). The attachment of the wiper arm (130) to the coupling member (135) is in the region of the first end segment of the wiper arm (130).

Description

FIELD OF THE INVENTION The present invention relates to a windscreen wiper blade system with a hinge comprising: - a substantially blade-shaped wiper arm for installing the broom wiper blade; windscreen wiper; a coupling member for attaching the wiper arm to a wiper shaft; and a spring member for exerting a thrust force on the coupling member. State of the art A wiper system is used to clean a vehicle window such as its windshield to eliminate moisture and dirt. The wiper system includes a wiper blade or wiper blade and a hinge for attaching the wiper blade or the wiper blade to a wiper shaft of a wiper blade. wiper drive. The articulated connection of the windscreen wiper arm makes it possible to impart to it an oscillating movement driven by the wiper shaft. The wiper blade or wiper blade travels through the glass to remove moisture or dirt. A recurring problem is that of the design of the hinge so that the wiper blade or the wiper blade is pressed optimally against the window. If the pushing force is too weak, the wiper blade may slip over the dirt cluttering the window such as for example ice instead of removing them from the window. If the application force is too great, it no longer allows to respect the optimum angle of inclination of the wiper blade or the flexible wiper blade so that it leaves streaks on the window. In addition, this causes premature wear of the wiper blade. The curvature of the window in the region swept by the wiper blade or the wiper blade generally depends on the angle at which the wiper blade or wiper blade is relative to the wiper blade or wiper blade. to the wiper shaft. The application force exerted must, under these conditions, not be static, but dynamic and be spread over the length of the wiper blade or the wiper blade.

OBJECT OF THE INVENTION The object of the present invention is to develop a wiper system with an articulation of the windscreen wiper blade or the wiping blade ensuring an optimized dynamic distribution of the application force of the wiper blade or wiper blade. wiper blade or wiper blade against glass. Since the wiper blade or the wiper blade is a wear part, the articulation of the wiper system must make it possible to produce the wiper blade or the wiper blade. as economically as possible.

DESCRIPTION AND ADVANTAGES OF THE INVENTION For this purpose, the subject of the present invention is a wiper system of the type defined above, characterized in that the attachment of the wiper arm to the coupling element is in the region of the first end segment of the wiper arm.

Thus, according to a first characteristic of the invention, the wiper system with the articulated connection of the wiper blade comprises a wiper arm substantially in the form of a ribbon or blade for receiving the wiper blade. wiper blade or the wiper blade, and a coupling member for attaching the wiper arm to the wiper shaft and a spring member generating the application force exerted on the wiper arm; the coupling element. The attachment of the wiper arm to the coupling member is in the region of the first end segment of the wiper arm. By mounting one side of the wiper arm to the coupling member, the wiper blade or the wiper blade is mounted in a simple manner on the wiper arm. The wiper arm can appropriately distribute the application force exerted by the spring member along the wiper blade or the wiper blade. This makes it possible to press the wiper blade or its wiper blade on the window to be cleaned, taking into account the variable curvatures encountered during scanning. The articulation of the wiper system according to the invention is achieved in a simple manner and with reduced means. The wiper blade or the wiper blade have a simple structure which results in a saving in production. Preferably, in the wiper system, the wiper arm applying the wiper blade or the wiper blade comes into a passage of the wiper blade or the blade wipers extending the full length thereof. This allows for a simple connection to manufacture and open, a connection by force between the wiper blade or the wiper blade and the wiper arm. In the region of the second end segment, the wiper arm has a recess or cutout for receiving a locking member to prevent the wiper arm from sliding off the wiper blade or the wiper blade. the wiper blade. The securing or locking member is advantageously provided in the region of the second end segment at an easily accessible location of the wiper arm to facilitate the change of the wiper blade or the wiper blade. . Thanks to the separate fixing or locking element, the construction of the wiper arm and / or the wiper blade and the wiper blade is simplified, which results in the other economic benefits. The coupling member of the wiper system comprises a base body made by cutting and bending into a ribbon or blade shaped raw material. In particular, the basic body is made of a flat steel blade-shaped, economically in large series. The series production of the coupling element is thus favored. In addition to the base body, the coupling member comprises an axle rotatably mounted on the base body transverse to the direction of force application by the spring member; the axis has a passage or cut transverse to the axis for the crossing of the first end segment of the wiper arm. This allows for pivotal mounting of the wiper arm to the coupling element, which is simple to manufacture and assemble. Transmission of the application force of the coupling member to the wiper arm is facilitated by the pivotal mounting. In addition, the coupling element has a fastening element for attaching to the wiper shaft and this fixing element is rotatably mounted to the base body via another axis, the spring element exerting a torque around this other axis. This makes it possible to fold down and raise the coupling element relative to the wiper shaft to work on the joint which facilitates the change of wiper blade or wiper blade. Thanks to the structure according to the invention, the coupling element is of simple and robust construction ensuring a long life of the joint. Attaching the first end segment of the wiper arm to the coupling member allows different embodiments. According to a first development, the coupling member comprises a clamping member which has a screw attached to the neck member to thereby clamp the wiper arm to the coupling member. This allows for a quick and easy connection to be removed between the wiper arm and the coupling element. The screw achieves a sufficient clamping force while complicating the removal of the wiper arm ws without tools, to thereby provide some anti-theft protection of the elements of the wiper system. According to another development, the clamping element of the first embodiment is attached to the coupling element by a clamping lever. The clamping lever facilitates the construction and removal of the link without the need for a tool. This facilitates the mounting of the wiper arm to the coupling element. According to a third development, a rotating locking member secures the first end segment of the wiper arm and the locking member engages for a first rotational position in a cut of the wiper arm. -glace and in a second rotational position, it blocks the wiper arm. The locking element is realized in a simple manner and with a cost of material and manufacturing reduced. The locking element may be actuated by means of a tool or without tools, for example by means of an actuating lever on the locking element. According to another development of the invention, the wiper blade or wiper blade of the above wiper system comprises a passage in their longitudinal direction for receiving the blade-shaped or ribbon of the wiper arm. The wiper blade or the wiper blade are thus made in a simple manner, for example by extrusion. The wiper blade or the wiper blade is inexpensively manufactured which improves the wiping result by the wiper blade or wiper blade of the wiper system. according to the invention by regularly replacing the windscreen wiper blade or the wiper blade without incurring excessive cost. Preferably, at its end segment, the windscreen wiper blade has a cutout for receiving the fastening or locking member preventing the wiper arm from slipping off the wiper blade. wiper. Clearing or cutting is advantageously carried out at the same time as the wiper blade or the wiping blade is cut to length during their manufacture. The complete wiper blade only needs to be cut out or disengaged at one end to dispense an ice wiper blade or a long wiper blade that is shortened to the length of the wiper blade. just before installing it on the wiper arm. This reduces the costs of storage and distribution of wiper blades or wiper blades. Drawings The present invention will be described in more detail below with the aid of various embodiments of an articulated link wiper system shown in the accompanying drawings, in which: FIG. 2 to 4 are detailed views of the coupling element of the windscreen wiper system of FIG. 1, FIG. 5 is a detailed view of an axis of the windscreen wiper system of FIG. FIG. 6 to 8 are detail views of other axes of the windscreen wiper system of FIG. 1, FIGS. 9 to 12 show the coupling element of the windscreen wiper system of FIG. FIG. 13 shows a wiper blade or a wiper blade of the windscreen wiper system of FIG. 1, FIGS. 14 to 16 show the wiper blade of FIG. wiper blade or wiping blade of Figure 13 in different stages of mounting on the wiper arm 1 of the wiper system of FIG. 1, FIGS. 17 to 19 show a fixing or locking element s in different stages of assembly on the wiper blade or the wiper blade of FIG. FIG. 20 shows a first attachment of the wiper arm of the wiper system of FIG. 1 to the coupling element, FIG. 21 is a sectional view of a second method of attachment of the wiper arm of the wiper system of FIG. Wiper arm of the wiper system of Figure 1 on the coupling element, Figures 22-23 show a third method of attachment of the wiper arm of the wiper system of In Figure 1 on the coupling member, Figures 24-25 show a fourth method of attaching the wiper arm of the wiper system of Figure 1 to the coupling member. DETAILED DESCRIPTION OF EMBODIMENTS FIG. 1 shows a wiper system 100 for cleaning a window 105, especially the windshield of a motor vehicle. The wiper system 100 comprises a wiper blade or wiper blade 110 not appearing in FIG. 1 and a hinge 115. The hinge 115 is connected to the wiper shaft. The hinge 115 comprises a windshield wiper arm 130, a coupling element 135 connecting the wiper arm 130 to the wiper shaft. -glace 120 and a spring element 140 not shown in this figure to create the thrust force exerted on the hinge 115. The spring element 140 30 is installed between the hinge 115 and the drive shaft wiper 125 so that the hinge 115 allows in particular to raise by tilting the wiper arm 130 relative to the window 105, for example to change the wiper blade. The wiper drive 125 reciprocates at a predefined angle, the wiper shaft 120 for the wiper arm 130 to travel through the window glass 105. The wiper arm 130 is preferably made of a flat, flexible material, such as a plastic material or a steel blade, where appropriate bent to substantially follow the upper surface of the glass pane 105. end segment remote from the wiper drive 125, has cutouts 132 in the wiper arm 130 for receiving a fastener blocking the wiper blade 110 to the wiper arm 130. The cutouts 132 will be described more specifically in connection with FIG. 19. FIG. 2 shows a detail view of the neck member 135 of FIG. 1. The coupling member 135 is composed of a base body 145, a first axis 150, a second axis 155 and a flange 160. The two axes 150, 155 can rotate around the base body 145, the axes 150, 155 being parallel to each other. The first axis 150 has a transverse passage for the end segment of the wiper arm 130. The second axis 155 is connected to the flange 160 itself installed for example to transmit the torque to the shaft The spring element 140 is installed between the flange 160 and the base body 145 to exert in a clockwise direction a torque on the base body 145 about the second axis. 155. An application force is thus created on the base body 145 of the coupling element 135; this force is transmitted by the wiper arm 130 to the wiper blade 110 itself pushed against the pane 105. The base body 145 of the embodiment shown is easily made of plastic or steel ribbon. The housings for the axes 150, 155 are obtained by bending or rolling the segments of the basic body 145; the clearances can be made by cutting or stamping or else according to another type of machining in the basic body 145. FIG. 3 shows another detail view of the coupling element 135 of FIG. end of the wiper arm 130 passes through the clearance of the first axis 150 to be fixed to the base body 145 by means of the fixing device 165 in the region 35 located between the axes 150, 155. The device of fastening 165 such as

8 and the variants of the fixing device will be described more specifically with reference to FIGS. 20 to 25. FIG. 4 shows another detail view of the coupling element 135. The figure shows that the flange 160 comprises a groove receiving an axial rib (key) of the wiper shaft 120 to provide a torque transmission link. Figure 5 shows a detail view of the second axis 155 of the flange 160 of the coupling member 135. The flange 160 and the two halves of the axis 155 are in one piece. According to another development-ment, the second axis 155 can also be made in one piece, separately or with the flange 160. Figure 6 shows a detail view of the first axis 150 of the coupling element 135. The first axis 150 is in the form of a tube preferably by rolling or welding or by stretching without welding. The middle segment of the tube 150 has tabs 170 on the opposite lateral sides; these tabs have been cut from the material of the tube to be curved inside the tube 150. The free ends of the tabs 170 face each other, one tab 170 being bent downwards and the other upwardly. The inwardly reclined tabs 170 thus delimit a lateral passage in the tube 150, upwards or downwards. Figure 7 shows the tube 150 of Figure 6 in an axial perspective. Between the end segments of the inwardly bent tabs, there is a gap receiving the end segment of the wiper arm 130. An insert 175 is provided to support the tabs 170; this insert is preferably made of plastic. The insert 175 is inserted axially into the hollow axis 150 or installed perpendicularly to the axis 150, acting in the direction of the end segments of the tabs 170. The insert 175 may constitute an elastic bearing for the segment. end of the wiper arm 130 while the tabs 170 ensure good transmission of forces to the first axis 150. Figures 9 to 12 show the coupling element 135 of the wiper system 100 of Figure 1 according to different mounting steps. 9 shows the base body 145 in which the clearances for the axes 150, 155 have been made. FIG. 10 shows the base body 145 in which the axes 150, 155 have been installed. With the flange 160 as shown in FIG. 5, the housings for the second axis 155 can be made on the base body 145 after installation of the second axis 155 on the base body 145. FIG. coupling 135 of Figure 10; the wiper arm 130 and the wiper shaft 120 are installed. The detail view of the upper part of FIG. 11 shows the clearance 180 of the flange 160. The clearance 180 receives one end of the spring element 140. FIG. 12 shows the coupling element 135 of FIG. 11 with the spring element 140 additionally installed. The spring member 140 is installed between the clearance 180 and a segment of the base body 145 in the region of the first axis 150. The spring member 140 is a tension spring exerting traction when the coupling 135 is raised by swinging clockwise with respect to the wiper shaft 120. FIG. 13 shows a wiper blade or wiper blade 110 of the wiper system 120. wiper 100 of FIG. 1. The wiper blade or the wiper blade 110 has a passage 185 for receiving the blade of the wiper arm 130. The passage 185 has a rectangular section likewise that the wiper arm 130 whose long side is substantially parallel to the upper surface of the pane 105. The wiper blade 110 has a rib structure in one direction and the end of this structure is intended to sweep the window 105. Figures 14 to 16 show the wiper blade or the wiper blade 110 of Fig. 13 in different mounting states on the wiper arm 130 of the wiper system 100 of Fig. 1. The segment of the wiper arm 130 remote from the coupling member 135, is introduced into the passage 185 of the wiper blade or the wiper blade 110 so that the side of the wiper blade 110 ending in a point, is oriented in the direction of 105. The wiper blade 110 is then fitted onto the wiper arm 130 until it (110) is applied at the coupling element 135 against the wiper arm 130. first axis 150 or its housing or against another abutment element of the base body 145. Figure 16 shows this situation. Next, a securing or locking member 190 is installed to prevent the wiper arm 130 from slipping out of the passage 185 of the wiper blade or the wiper blade 110. Figures 17 to 19 show the fastening or locking member 190 for attaching the wiper blade or the wiping blade 110 to the wiper arm 130. At the end of the wiper blade 110 which is after fitting of the wiper blade 110 on the wiper arm 130, arrives in the region of the clearances 132, the sides of the passage 185 have been removed. As a result, the end segment of the wiper arm 130 is disengaged so that the cutouts 132 are fed with the locations from which the sides have been removed. The fastener 190 is a clipping member which is axially engaged on the superposed end segments of the wiper arm 130 and the wiper blade 110 so that the clipping members 195 of the securing member 190 take hold behind the end segment of the wiper arm 130 and snap into the recesses 132. Figure 19 shows this situation. The fixing member 190 is at the same time pressed against the wiper blade 110 which can no longer in these conditions be released from the wiper arm 130 to the left. To remove the fastener 190, the clipping members 195 must be removed, preferably by pressing or pulling them laterally, and the fastener 190 will be disengaged axially to the left of the wiper arm 130. Figure 20 shows the attachment device 165 of the wiper system 100 of Figure 1 corresponding to a first embodiment. A nip member 205 includes a front segment 210, an intermediate segment 215, and a rear segment 220. Two opposing tabs 225 of each segment 210-220 are bent downwardly. The tabs 225 of the intermediate segment 215 are closer than the tabs 225 of the front and rear segments 210, 220. The tabs 225 of the intermediate segment 215 descend lower than the tabs 225 of the other segments 210 and 220. The wiper arm FIG. 130 is shown in two positions relative to the clamping member 205. In the lower position, there is a cutout 230 into which the tab 225 of the intermediate segment 215 penetrates when the wiper arm 130 located in its upper position relative to the clamping element 205. The wiper arm is thus locked in the axial direction and in the radial direction to the nip element 205. In the upper position, the element pinch 205 can be blocked by a screw 235 to the end segment of the wiper arm 130. The wiper arm 130 for this purpose has a bore with a corresponding internal thread. FIG. 21 shows the fastening device of the windscreen wiper system 100 of FIG. 1 corresponding to a second embodiment. An L-shaped clamping member 305 is attached by a pin 310 to the base body 145 of the coupling member 135 so that one or more pins 315 of the clamping member 305 enter corresponding cuts 320 of the coupling member 305. end segment of the wiper arm 130 when the free end of the clamping element 305 approaches the base body 145. The free end of the clamping element 305 can be fixed by means of a lever. Eccentric clamping 320 in the manner of a toggle lever press with respect to the base body 145. For this, the clamping lever 320 is supported by a screw 325 whose head is applied against the base body 145. Figures 22 and 23 show the attachment device 165 of the wiper system 100 of Figure 1 according to a third embodiment. The embodiment shown corresponds to the embodiments of Figures 1 to 4 and 10. The region of the end segment of the wiper arm 130 includes a cutout 405 which is substantially in the shape of a keyhole. A locking member 410 is provided on the base body 145 in the region between the axes 150 and 155. The locking member 410 has an I-shaped end segment which is installed in the axial direction in the cut 405 of the wiper arm 130 when it occupies a first rotational position shown in Figure 5 and is fixed to not slip s out of the cutout 405 if the arm is in a second position rotated by relative to the first position of FIG. 23. The actuation of the locking element 410 is not shown. In one embodiment, the locking member 410 rotates with a lever which is for example in the embodiment of Figures 22 and 23 above or below the locking member 410. Figures 24 and 25 show the fixing device 165 of the wiper system 100 of FIG. 1 corresponding to a fourth embodiment. A clamping member 505 is installed so that it can be folded about an axis 510 on the base body 145 of the coupling member 135. The free end of the clamping member 505 is moved towards the body base 145, clamps the clamping member 505 and the base body 145 of the wiper arm 130. To provide sufficient clamping or clamping effect, a rotational connection 515 is provided between the side wall The rotational connection 515 has a rotatable member 520 which has an oval head or is eccentric in the cavity 525 of the side wall of the barrel. 505. The rotating member 520 allows different rotation positions, of which a first is shown in FIG. 4 and a second in FIG. 5. The first rotational position shown in FIG. to have a say The first rotational position allows the wiper arm 130 to be raised or removed from the coupling member 135. The second position of rotating the rotating member 520 shown in Fig. 25 in the recess 525 presses the front end of the clamping member 505 against the base body 145 so that the wiper arm 130 is tightened securely. guarantee between the clamping member 505 and the base body 145 of the coupling member 13 135. This second rotational position is suitable for the wiping mode of the wiper system 100. According to another embodiment not shown, the wiper arm 130 is connected by another connection, if any non-detachable to the coupling element 135. The change of the wiper blade can be done as indicated above by Referring to Figures 13 to 19. 10 NOMENCLATURE

100 wiper system 105 window / windshield s 110 wiper blade / wiper blade / wiper blade 115 knuckle 120 wiper shaft 125 wiper shaft 130 wiper arm / blade 10 132 cutout 135 coupling element 140 spring element 145 basic body 150 first axis / tube 15 155 second axis 160 flange 165 fastening device 170 tab 175 insert 20 180 cutout / clearance 185 passage 190 fastening element 195 clipping element 205 gripping element 25 210 front segment 215 intermediate segment 220 rear segment 225 tab 230 cutting 30 235 screws 310 axis 315 stud 320 cutting 405 cutting 35 410 locking element

Claims (1)

CLAIMS1 »Wiper system (100) comprising a wiper blade (110) with a hinge (115) comprising: a wiper arm (130) substantially blade-shaped for installing the wiper blade wiper arm (110), a coupling member (135) for attaching the wiper arm (130) to a wiper shaft (125) and a spring element (140) for exerting a thrust force on the coupling element (135), a wiper system characterized in that the attachment of the wiper arm (130) to the coupling element (135) is in the region the first end segment of the wiper arm (130). Wiper system (100) according to claim 1, characterized in that the windscreen wiper arm (130) is housed in a passage (185) of the windscreen wiper / blade blade. wiping (110) according to its extension for attaching the wiper / wiper blade (110). The wiper system (100) according to claim 2, characterized in that in the region of the second end segment, the wiper arm (130) has a cutout (132) for receiving a securing member (195) preventing the wiper arm (130) from slipping out of the lai frame / wiper blade (110). The wiper system (100) according to claim 1, characterized in that the coupling element (135) comprises a base body (145) formed by cutting and bending a shaped starting material. of ribbon. A wiper system (100) according to claim 1, characterized in that the coupling element (135) comprises a base body (145) and an axis (150) rotating on the base body ( 145) transversely to the direction of force exerted by the spring member (140), the axis having a transverse passage to the axis for receiving the first end segment of the windscreen wiper arm ( 130). The wiper system (100) of claim 5, characterized in that the coupling member (135) has a fastener (160) for attachment to the wiper shaft (120). ), * the fastening element (160) being rotatably mounted on the base body (145) by another axis (155) and the spring element (140) exerts a torque around this other axis (155) . The wiper system (100) of claim 1, characterized by a clamping member (205) for securing the first end segment of the wiper arm (130), and the clamping member (205) is attached to the coupling member (135) by a screw (235) for clamping the wiper arm (130) on the coupling member (135). The wiper system (100) of claim 1, characterized by a clamping member (305) for securing the first end segment of the wiper arm (130) and said clamping member (305). ) is secured by a clamp lever (320) to the coupling member (135) to clamp the wiper arm (130) to the coupling member (135). The wiper system (100) of claim 1, characterized by a locking member (410) for securing the first end segment of the wiper arm (130) and said locking member (410). ) penetrates for a first rotational position into a cutout (405) of the wiper arm (130) and blocks the wiper arm (130) for a second rotational position. 3518 10 »Wiper system -glace (100) according to claim 1, characterized in that the windscreen wiper blade (110) has a passage (185) in its longitudinal extension for receiving a blade-shaped segment of the wiper arm. ice cream (130). The wiper system (100) of claim 10, characterized in that the wiper blade (110) has a cutout (132) at its end segment for receiving an element. securing (195) to prevent the wiper arm (130) from sliding off the wiper blade (110). 15