DE10040129A1 - Windscreen wiper has connector at end of arm with slots, into which ends of spring rails supporting wiper blade fit - Google Patents

Abstract

The windscreen wiper has a connector (17) at the end of the arm (2). This has slots, into which the ends of the spring rails (14) supporting the wiper blade (3) fit.

Description

The invention relates to a wiper device, in particular for motor vehicles, with a wiper arm, with one on the one end of the wiper arm existing wiper blade, which a Squeegee with two opposite, in Longitudinal extending longitudinal grooves and one Carrying element in the form of two in the longitudinal grooves arranged, band-like elongated spring rails includes, and with one on the wiper blade facing End of the wiper arm arranged connecting section to Connection of the wiper blade.

With such wiping devices this ensures Carrying element in the form of two spring rails an optimal Distribution of the wiper blade starting from the wiper arm Contact pressure on the disc. The spring rails are in the unloaded condition, so if the wiper blade is not on the Disc rests, pre-bent accordingly and have a Curvature on. The spring rails thus replace one elaborate support bracket and claw bracket construction, like them has become known for example from DE 15 05 357 A1.

In the wiping devices of the type described above has the connection of the wiper blade to the wiper arm or to the designated connecting section as highlighted problematic.

The present invention is therefore based on the object based on a reliable, durable and preferred detachable connection of the wiper blade to the Ensure connecting section.

This task is the beginning of a wiper described type according to the invention solved in that the Spring rail ends at least at one end of the wiper blade protrude longitudinally over the squeegee and that on a connecting element is present in the connecting section which receives the spring rail ends. As a result of that the spring rail ends protrude over the squeegee and this spring rail ends by means of a connecting element must be held on the wiper arm on the wiper blade no further, additional components for connecting the Wiper blade can be arranged on the wiper arm. In particular in large series production this can result in enormous costs be saved.

It can be provided according to the invention that the Spring rail ends positive and / or non-positive on the Connection element are arranged.

Advantageously, can also be provided according to the invention be that the connecting element and / or the Has or have spring-loaded spacer means, which is a distance between the two spring rail ends define each other. Such distance means can for example arranged on the connecting element,  pins or webs protruding between the two spring rails represent. This ensures that a precise positioning of the Spring rail ends on or in the connecting element is achieved, which leads to an optimization of the wiping result contributes.

In a particularly preferred embodiment of the Invention, the connecting element provides a receptacle in which the spring rail ends can be inserted axially. On such axial insertion of the spring rail ends has proven particularly advantageous in particular because the wiping device in the wiping mode in axial Direction, d. H. in the direction of the longitudinal axis of the wiper blade, relative is lightly loaded.

For a defined insertion of the spring rail ends into the To achieve admission can continue according to the invention it should be provided that the spring rails stop means, in particular stop edges, which have the The spring bars can be inserted in the axial direction limit. Too far insertion of the spring rail ends in this can prevent the recording.

To ensure that the To reach connecting element on the wiper arm in order to and / or engages behind in a further embodiment of the Invention of the wiper arm at least the connecting element  sections. Advantageously, this is the Connection element clamped to the wiper arm.

In a particularly preferred embodiment of the Invention, the connecting element has a clamping body a foldable clamping lever, the clamping body in Mounting position the spring rail ends in the Connection element holds non-positively. Such one Clamping body with clamping lever is easy to handle and open simple and inexpensive way to implement.

In the following, the mounted wiper device, i.e. with mounted wiper blade, Roger that. The position is under the insertion position understood in which an introduction or a Lead out the spring rail ends in the Connection element is possible.

For example, it can advantageously be provided that the clamping body is an eccentrically mounted clamping cylinder is. The clamping cylinder can be in Mounting position are brought in which he the Spring rails non-positively in the connecting element supports.

On the other hand, it is also conceivable that the clamping body centrally mounted clamping cylinder is one has flattened surface portion. In the Insertion position of the clamping lever can be due to the  flattened surface section the spring rail ends in the connecting element are inserted. By flipping the Clamping lever with a spring rail ends cylindrical surface portion of the clamping cylinder acts, whereby the spring rail ends in the Connection element clamped or non-positively held become.

Furthermore, it can be provided according to the invention that the Clamping lever has holding means in the assembly position in retaining recesses on the spring rail ends intervention. By engaging the holding means in the Retaining recesses will be in addition to the non-positive Connection a positive connection between the Connection element or between the on the Connection element existing clamping lever and Spring rail ends reached.

It can advantageously be provided that the Retaining means pin and the holding recesses punch holes are. Such pins can be easily and Form for example on the clamping lever. By punching can be fast and easy in the spring rail ends Way holes are made. These holes can for example, be cylindrical or angular. It is also conceivable not to punch holes, but instead just make notches in which then appropriately shaped holding means can intervene.  

In another, also preferred embodiment of the Invention have the spring rail ends recesses, wherein the connecting element when inserting the Spring rail ends in the receptacle at least one in the Has recesses retaining section snapping. A Such a wiper device has the advantage that for a Holding the spring rail ends in the connecting section no components are to be operated. The bracket of the Wiper blade on the wiper arm is done only by in the Cut-out holding sections. Under Cutouts can be both breakthroughs in the form of Holes as well as angular or round notches or Indentations are understood.

In order to snap the holding sections as far as possible The connecting element has a simple manner of implementation advantageously a spring tongue with at least one holding section arranged thereon. The spring tongue extends advantageously along the Longitudinal center axis of the wiper blade.

In a development of the invention, the spring tongue an actuating section, the actuation of Holding section is guided out of the recesses. This allows the spring rail ends in a simple manner Way, namely by operating the operating section, be detached from the connecting element, causing a detachment of the wiper blade is made possible by the wiper arm.  

To operate the operating section in a simple manner and way to enable can continue according to the invention be provided that the actuating section in a the recess arranged in the wiper arm protrudes. Such one The actuating section is advantageously easily accessible.

Further advantageous refinements and details of Invention can be found in the following description, in of the invention with reference to that shown in the drawing Exemplary embodiments are described and explained in more detail.

Show it:

Fig. 1 shows a wiper device according to the invention in side view;

Fig. 2-4, a first embodiment of a wiper device according to the invention in various views and partial sections;

Fig. 5 u. 6 two different clamping levers with clamping cylinders of the embodiment according to FIGS . 2 to 4; and

Fig. 7-10 a second wiper device according to the invention in different views and sections.

In FIG. 1, a wiper device 1 is shown, comprising a wiper arm 2, and a wiper blade 3. At one end of the wiper arm 2 is a drivable component 4 with a conical hub 5 for receiving a driven wiper shaft, not shown. The drivable component 4 is connected to the wiper arm via an articulated bearing 6 . In addition, a spring element 7 is present between the drivable component 4 and the wiper arm 2 in order to apply a corresponding wiper blade contact pressure to the wiper arm 2 or the wiper blade 3 .

According to the invention, it is also conceivable that the hub 5 for receiving a wiper shaft is arranged directly on the end of the wiper arm 2 facing away from the wiper blade 3 .

The wiper blade 3 comprises a wiper rubber 8 with a wiper lip 9 facing the window to be wiped, not shown. Furthermore, the squeegee 8 provides two mutually opposite, longitudinally extending longitudinal grooves 12 and a support element in the form of two band-like elongated spring rails 13 arranged in the longitudinal grooves 12 . The spring bars 13 in this case have at one end of the wiper blade 3 extending in the longitudinal direction over the wiper rubber 8 spring strip ends fourteenth The spring rail ends 14 are received by a connecting element 17 present on the end of the wiper arm 2 facing the wiper blade 3 .

The area marked X in FIG. 1 is described in more detail in FIGS. 2 to 6 in a first embodiment of the invention and in FIGS. 7 to 10 in a second embodiment of the invention.

Fig. 2 shows a longitudinal section of the wiper device 1 according to the invention. The connecting element 17 shown has a receptacle 18 into which the spring rail ends 14 can be inserted axially. In order to limit the insertability of the spring rail ends 14 in the axial direction, 13 stop means in the form of stop edges 19 are provided on the spring rails. In this case, the stop edges 19 abut the connecting element 17 on the end face in the assembly position.

On the connecting element 17 , as can be clearly seen in particular in FIG. 2, a clamping body in the form of a clamping cylinder 22 with a foldable clamping lever 23 is arranged. Fig. 2 shows the mounting position, ie the position in which the spring strip ends are supported in the connecting member 17 14. The insertion position of the clamping lever 23 or the clamping cylinder 22 is shown in dashed lines. In the insertion position, the spring strip ends 14 can be axially screwing in or taken out in or from the receptacle 18 of the connecting element 17th The clamping cylinder 22 is arranged in a barrel-shaped receptacle 24 .

As shown in FIG. 4, which shows the view from below of the connecting element 17 arranged on the wiper arm 2 , the clamping cylinder 22 can be inserted laterally along the arrow 27 into the barrel-shaped receptacle 24 with the clamping lever 23 . For this purpose, the receptacle 24 has an insertion groove 28 running transversely to the longitudinal axis of the wiper blade. Following the insertion groove 28 , a recess 30 is arranged, which enables the clamping lever 23 to be folded over into the mounting position.

Thus, after the clamp cylinder 22 is inserted with a clamping lever 23 into the receptacle 24, the arrow 29 may be made a non-positive connection of the spring strip ends 14 with the connecting member 17 by moving the clamping lever 23 in the direction.

As shown in FIGS . 2 and 3, the clamping lever 23 can have holding means in the form of two pins 32 which, in the mounting position, engage in holding recesses in the form of punched holes 33 on the spring rail ends 14 . The connecting element 17 also has cutouts 34 through which the pins 32 engage in the assembly position.

An additional securing of the wiper blade 3 on the wiper arm 2 is thus achieved. In particular, this form fit between pin 32 and punched holes 33 prevents the wiper blade 3 from being displaceable in the axial direction.

In FIG. 4, however, for reasons of clarity the plug 32 and the recess 34 are not shown.

In FIG. 3, a spacer in the form of a web 37 is present between the two spring rail ends 14 , which defines a distance a between the two spring rails.

In order to achieve a permanent and functionally reliable arrangement of the connecting element 17 on the free end of the wiper arm 2 , the free end of the wiper arm 2 has the connecting element 17 around and / or engaging tabs 38 . The connecting element 17 is thereby held clamped at the ends of the wiper arm 2 .

In FIG. 5, a clamping lever 23 is shown with the clamping cylinder 22 arranged thereon. In this embodiment, the clamping cylinder 22 is mounted centrally and has a flattened surface section 42 . When the clamping lever 23 is rotated about the axis 40 , the distance between the axis of rotation 40 and the surface of the clamping cylinder 22 is reduced due to the flattened surface 42 , as a result of which the non-positive connection between the spring rail ends 14 and the connecting element 17 or the wiper arm 2 is released.

Instead of a clamping cylinder 22 according to FIG. 5, it is conceivable to provide an eccentrically mounted clamping cylinder 22 according to FIG. 6. Due to the eccentrically arranged axis 41 , the distance between the spring rail ends 14, not shown, and the surface of the eccentrically mounted clamping cylinder 22 is increased when the clamping lever 23 is moved along the arrow 43 . This enables the non-positive connection between the connecting element 17 and the spring rail ends 14 to be released.

In the embodiment of the invention according to FIGS. 7 to 10, the connecting element 17 has a receptacle 58 into which the spring rail ends 14 can be inserted axially. In order to limit the insertability of the spring rail ends 14 in the axial direction, stop means in the form of stop edges 59 are provided on the spring rails, which abut the end face of the connecting element 17 in the assembly position.

As is clear in particular from Fig. 8, the spring strip ends 14 have recesses 62. The recesses 62 are arranged on the mutually facing sides of the spring rail ends 14 and punched into the spring rails 14 as rectangular cuts.

The connecting element has, as shown particularly clearly in FIG. 7, a spring tongue 63 with an actuating section 64 arranged on the free end of the spring tongue 63 , which extends in the direction facing away from the wiper blade. The spring tongue 63 advantageously runs centrally in the longitudinal direction of the wiper arm 2 and the actuating section 64 protrudes in the assembly position into an easily accessible recess 67 arranged on the wiper arm 2 .

Of the spring tongue, a wedge-shaped retaining portion 69 is formed, which engages in the embodiment shown in FIGS. 7 to 10 mounting position in the recesses 62 on the spring rail ends 14. As a result, the spring rail ends 14 are positively held on the connecting element 17 . In order to detach the wiper blade 3 from the wiper arm 2 , the actuating section 64 is pressed in the direction of the arrow 68 , as a result of which the holding section 69 is led out of the cutouts 62 . This allows the spring rail ends 14 to be pulled out axially from the receptacle 58 . When the spring rail ends 14 are inserted into the receptacle 58 , due to the wedge-like configuration of the holding section 69, the latter is first pressed down against the spring force and then snaps into the recesses 62 . No further components are therefore required to hold the wiper blade 3 on the wiper arm 2 .

As can be clearly seen from FIG. 8 in particular, the connecting element 17 or the spring tongue 63 has two webs 77 projecting between the spring rail ends. In this case, these webs 77 form spacing means which define a distance a between the two spring rail ends 14 from one another.

In order to achieve a permanent and functionally reliable connection of the connecting element 17 to the free end of the wiper arm 2 , the wiper arm 2 has tabs 78 which engage around and engage behind the connecting element 17 in sections. The connecting element 17 here, as can be seen in particular from FIG. 7, has recesses 79 for receiving the tabs 78 . The connecting element 17 is hereby advantageously held clamped at the ends of the wiper arm 2 .

All in the description, the following claims and The features shown in the drawing can be both individually as well as in any combination with each other be essential to the invention.

Claims (15)

1. Wiper device ( 1 ), in particular for motor vehicles, with a wiper arm ( 2 ), with a wiper blade ( 3 ) present at one end of the wiper arm ( 2 ), which wiper blade ( 8 ) with two opposite, extending in the longitudinal direction Includes longitudinal grooves ( 12 ) and a support element in the form of two elongate spring rails ( 13 ) arranged in the longitudinal grooves ( 12 ), and with a connecting section arranged on the end of the wiper arm ( 2 ) facing the wiper blade ( 3 ) for connecting the wiper blade ( 2 ), characterized in that the spring rail ends ( 14 ) protrude at least at one end of the wiper blade ( 2 ) in the longitudinal direction over the wiper rubber ( 8 ) and that a connecting element ( 17 ) is present on the connecting section, which connects the spring rail ends ( 14 ) receives. 2. Wiper device ( 1 ) according to claim 1, characterized in that the spring rail ends ( 14 ) are arranged positively and / or non-positively on the connecting element ( 17 ). 3. Wiper device ( 1 ) according to claim 1 or 2, characterized in that the connecting element ( 17 ) and / or the spring rail ends ( 14 ) has or have spacing means ( 38 , 78 ) which have a distance (a) between the two spring rail ends ( 14 ) define each other. 4. Wiper device ( 1 ) according to claim 1, 2 or 3, characterized in that the connecting element ( 17 ) provides a receptacle ( 18 , 58 ) into which the spring rail ends ( 14 ) can be inserted axially. 5. Wiper device ( 1 ) according to claim 4, characterized in that the spring rails ( 13 ) have stop means, in particular stop edges ( 19 , 59 ), which limit the insertability of the spring rail ends ( 14 ) in the axial direction. 6. Wiper device ( 1 ) according to one of the preceding claims, characterized in that the wiper arm ( 2 ) at least in sections encompasses and / or engages behind the connecting element ( 17 ). 7. Wiper device according to one of the preceding claims, characterized in that the connecting element has a clamping body ( 22 ) on a foldable clamping lever ( 23 ), the clamping body ( 22 ) holding the spring rail ends ( 14 ) in the connecting element ( 17 ) non-positively in the mounting position , 8. Wiper device according to claim 7, characterized in that the clamping body is an eccentrically mounted clamping cylinder ( 22 ). 9. Wiper device ( 1 ) according to claim 7, characterized in that the clamping body is a centrally mounted clamping cylinder ( 22 ) which has a flattened surface section ( 43 ). 10. Wiper device ( 1 ) according to claim 7, 8 or 9, characterized in that the clamping lever ( 23 ) has holding means ( 32 ) which engage in the mounting position in the spring recesses ( 14 ) existing holding recesses ( 33 ). 11. Wiper device ( 1 ) according to one of claims 7 to 10, characterized in that the holding means pins ( 32 ) and the holding recesses are punched holes ( 33 ). 12. Wiper device ( 1 ) according to one of the preceding claims, characterized in that the spring rail ends ( 14 ) have recesses ( 62 ) and that the connecting element ( 17 ) when inserting the spring rail ends ( 14 ) into the receptacle ( 58 ) at least one in the Has recesses ( 62 ) snapping holding portion ( 69 ). 13. Wiper device ( 1 ) according to claim 12, characterized in that the connecting element ( 17 ) has a spring tongue ( 63 ) with at least one holding section ( 69 ) arranged thereon. 14. Wiper device according to claim 12 or 13, characterized in that the spring tongue has an actuating section ( 64 ), upon actuation of which the holding section ( 69 ) can be led out of the recesses ( 62 ). 15. Wiper device according to claim 12, 13 or 14, characterized in that the actuating section ( 64 ) projects into a recess ( 67 ) arranged on the wiper arm ( 2 ).