DE102009000762A1 - Wiper blade for windscreen wiper of motor vehicle, has adapter parts with foot areas that contact back strip of wiper strip and are fixed to adapter unit in preset fixed position relative to wiper arm - Google Patents

Abstract

The blade (10) has an adapter unit (50) for securing a wiper strip (12) to a wiper arm (18). The wiper strip has a back strip (24), and two foldable adapter parts are provided at the unit. The adapter parts have foot areas and head areas that are connected with each other by a joint. The adapter parts form a fixing element in a folded condition of the unit. The element fixes the wiper arm to the unit in axial direction of the blade. The foot areas contact the back strip and fixed to the adapter unit in a preset fixed position relative to the arm.

Description

State of the art

The The present invention relates to a wiper blade for a Windscreen wiper, with a wiper strip and an adapter unit for fastening the wiper strip to a wiper arm.

The EP 0 141 186 B1 describes such a wiper blade, in which one of a molded plastic body with an integrally formed joint adapter unit comprises two approximately symmetrical parts which are pivotable about the hinge. These are arranged on a Wischarmende and fastened by folding together and thus at the Wischarmende. The folded parts form a circular-arc-shaped bearing element into which a provided on a wiper blade associated wiper blade, cylindrical pivot axis can be inserted.

adversely in the prior art is that provided on the wiper strip Swivel axis is required to attach to the wiper arm to allow attached adapter unit to the wiper strip. Also, the adapter unit must first be attached to the wiper arm before the wiper strip can be attached to the adapter unit. This makes the handling of the adapter unit cumbersome and complicated.

Disclosure of the invention

A The object of the invention is therefore to provide a new wiper blade for to provide a windshield wiper, with an adapter unit, which is easy to handle and a joint free connection to the Waschblatt associated wiper strip with a corresponding wiper arm allows.

This Problem is solved by a wiper blade for a Windscreen wiper, with a wiper strip and an adapter unit for fastening the wiper strip to a wiper arm. The wiper strip has a back bar. On the adapter unit are at least two collapsible adapter parts provided by a jointed head portions and associated foot portions exhibit. The adapter parts form in the folded state the adapter unit from a fixing, which the wiper arm in the Fixed adapter unit in the axial direction of the wiper blade, wherein the foot areas of the adapter parts the back strip the wiper strip at least partially engage around and in the adapter unit fix in a predetermined position relative to the wiper arm.

The Invention thus enables the provision of a wiper blade, in the case of a simple and inexpensive adapter unit achieved a joint-free connection between wiper strip and wiper arm becomes.

The Foot areas of the adapter parts include the back bar the wiper strip in the folded state of the adapter unit preferably claw-like at least in sections.

Consequently can be a simple and stable connection between the wiper strip and Adapter unit can be achieved.

According to one Embodiment, the foot portions have latching means on and on the back bar are associated counter-locking means provided, wherein the locking means in the folded state of Lock adapter unit with counter-latching means. The locking means and the counter-locking means are preferably at least in sections designed as longitudinal ribs.

The Invention thus enables a simple way secure attachment of the adapter unit to the wiper strip.

According to one Embodiment is at least a first of the collapsible Adapter parts provided at least one clamping element and at least a second of the adapter parts has at least one associated Verklemmelement for jamming the clamping element. The clamping element is preferred a clamping pin and the clamping element is preferably a clamping tube for receiving the clamping pin.

Consequently becomes stable in the folded state of the adapter unit Attachment of the folded adapter parts allows each other.

The Clamping element is preferred for storage of a hook-shaped End region of the wiper arm formed. At least one of the collapsible Adapter parts is preferably provided a blocking member, the is adapted to the hook-shaped end portion of the Wischarms in the folded state of the adapter unit in the axial To block the direction of the wiper blade. Here is the hook-shaped End region at least partially between fixing and Clamping element arranged.

The Invention thus enables easy positioning the end portion of the wiper arm in the adapter unit, wherein a axial displacement of the adapter unit on the wiper arm during operation of the wiper blade is prevented.

The wiper strip preferably has at least a groove-like recess, and on at least one of the adapter parts, an associated holding element for engaging in the groove-like recess is formed.

Consequently can in a simple way an axial displacement of the wiper strip be prevented in the adapter unit during operation of the wiper blade and Correct positioning of the wiper strip on the adapter unit be ensured during assembly.

The The aforementioned problem is also solved by an adapter unit for attaching a wiper blade for a windshield wiper associated wiper strip on a wiper arm. At least two collapsible Adapter parts are provided which are interconnected by a hinge Have head areas and associated foot areas. The Adapter parts form in the folded state of the adapter unit a fixing element, which is adapted to the wiper arm in to fix the adapter unit in the axial direction of the wiper blade, wherein the foot portions of the adapter parts are formed are, a back strip of the wiper strip in the folded Condition of the adapter unit at least partially surround and in the adapter unit in a predetermined position relative to fix the wiper arm.

Brief description of the drawings

The The invention is based on embodiments shown in the drawings explained in more detail in the following description. Show it:

1 a side view of a wiper blade according to the invention,

2 a perspective view of a section of the wiper blade of 1 with a folded adapter unit according to an embodiment,

3 a perspective view of the section of 2 with unfolded adapter unit,

4 a side view of the detail of 3 with unfolded adapter unit, and

5 a sectional view of the section of 4 with folded adapter unit, along the line VV of 4 ,

Description of the embodiments

1 shows a wiper blade 10 with a wiper strip 12 one above a tipping foot 27 with a back bar 24 connected wiper lip 29 having. At the wiper strip 12 is an adapter unit 50 for connecting a wiper arm 18 attached. With the help of the wiper arm 18 can the wiper blade 10 for wiping over a dot-dashed disk 22 , z. As a vehicle window, are performed.

In one embodiment, the wash sheet is 10 designed as a joint-free wiper blade, ie the wiper strip 12 and the wiper arm 18 are via the adapter unit 50 without a materially executed pivot axis connected to each other, so that the wiper arm 18 and the wiper strip 12 are not pivotable relative to each other. Hereinafter, this type of connection is also referred to as a "joint-free connection" or "joint-free attachment". Components which due to a material deformation, in particular an elastic deformation, a relative movement between the wiper arm 18 and the wiper strip 12 are not considered as hinges in the context of the present invention.

In 1 is the wiper blade 10 not yet completely on the disc 22 put on, there are only the axial wiper blade ends 21 . 23 at the disc 22 on while the wiper strip 12 in wiper blade center 26 ie in the area of the adapter unit 50 , still from the disc 22 is spaced. Will over the wiper arm 18 a planned contact pressure on the adapter unit 50 exerted, puts under the tension of an associated, rail-like spring element ( 14 in 2 ) the wiper strip 12 at the disc 22 at. This tension ensures that a consistent contact pressure is maintained over the entire length of the wiper blade, even if the disc curvature changes during the course of the wiping movement.

2 shows an in 1 with II marked section of the wiper blade 10 from 1 according to one embodiment, with the wiper strip 12 passing through the adapter unit 50 in the folded state without joints on the wiper arm 18 is attached. The wiper strip 12 has the preferred as a hollow profile with a longitudinal channel 25 trained back bar 24 at the adapter unit 50 is attached. In the longitudinal channel 25 is a rail-like spring element 14 arranged as above 1 described.

The adapter unit 50 is z. B. made of plastic and has, for example, two collapsible adapter parts 52 . 58 which are preferably formed claw-like and therefore hereinafter also referred to as "adapter claws". The adapter claw 52 has a head area 82 and a foot area 81 , The adapter claw 58 has a head area 88 and a foot area 87 , The head areas 82 . 88 are through a joint 55 with each other prevented.

The adapter claws 52 . 58 enclose an end region ( 15 in 3 ) of the wiper arm 18 , with their foot areas 81 . 87 the back bar 24 the wiper strip 12 claw-like in a given area. Here is the wiper strip 12 in the adapter unit 50 in a predetermined position relative to the end region ( 15 in 3 ) of the wiper arm 18 fixed. To an axial displacement of the adapter unit 50 on the wiper arm 18 to prevent is a blocking element 59 on the adapter claw 58 provided that the wiper arm 18 in an axial direction of the wiper blade 10 blocked, as below 4 described.

3 shows the section of the wiper blade 10 from 2 with the adapter unit 50 in the unfolded state. For opening the adapter unit 50 is z. B. the adapter claw 52 in the direction of an arrow 99 around the joint 55 pivoted.

According to one embodiment, the wiper arm 18 a hook-shaped end portion 15 up, with an arm end 19 concludes. In this hook-shaped end area 15 preferably takes a Verklemmelement 57 one, that on the adapter claw 58 is provided. This is exemplary as a clamping tube for mounting the hook-shaped end portion 15 of the wiper arm 18 educated. The hook-shaped end region 15 has a circular arc-shaped curve 17 whose diameter is about the diameter of the clamping tube 57 equivalent. The rounding 17 is approximately in the area between the clamping tube 57 and the blocking member 59 arranged.

At the wiper strip 12 is preferably at least one groove-like recess 28 intended. This is designed to ensure correct positioning of the wiper strip 12 on the adapter unit 50 to enable.

4 shows the section of the wiper blade 10 from 3 in a side view. This serves to illustrate an exemplary embodiment of the adapter unit 50 ,

According to one embodiment are on the adapter claw 52 two clamping elements 51 . 56 educated. The clamping element 51 is exemplified bolt-like and on to the adapter claw 58 trained blocking member 59 clamped. This is in 4 formed double-walled, wherein between the walls a distance is provided, which is preferably smaller than the thickness of the clamping bolt 51 , The clamping element 56 is exemplified as a cylindrical clamping pin. This is in the on the adapter claw 58 trained clamping tube 57 insertable and clamped there.

It However, it should be noted that the number and design of the Clamping and Verklemmelemente only by way of example and not as Restriction of the invention are described and application specific can vary. Also, instead of such Clamping and clamping elements equivalent fastening elements Find application, for. B. resilient locking elements and suitable counter-locking elements.

As mentioned above 3 described, is the circular arc-shaped curve 17 of the wiper arm 18 between the clamping tube 57 and the double-walled blocking member 59 arranged. There blocks the blocking member 59 the hook-shaped end region 15 of the wiper arm 18 in the axial direction of the wiper blade 10 ,

In the unfolded state of the adapter unit 50 this can be in the lateral direction, ie approximately perpendicular to the axial direction of the wiper blade 10 , from wiper strip 12 and wiper arm 18 be removed. In the folded state of the adapter unit 50 form the clamp tube 57 and the blocking member 59 with the clamping pin 56 and the clamping bolt 51 a fixing element, which is the wiper arm 18 in the adapter unit 50 in the axial direction of the wiper blade 10 fixed, ie the wiper arm 18 can in the folded state of the adapter unit 50 only together with adapter unit 50 and wiper strip 12 in the axial direction of the wiper blade 10 to be moved.

5 clarifies the fixation of the wiper arm 18 and the wiper strip 12 in the adapter unit 50 in the folded state of the adapter unit 50 , The wiper arm 18 is on the one hand between the head areas 82 . 88 the adapter claws 52 . 58 fixed and lies on the other hand with his arm end 19 on a top - in 5 - the back bar 24 the wiper strip 12 on. The bottom - in 5 - the back bar 24 lies on carrying elements 53 . 54 the foot areas 81 respectively. 87 the adapter claws 52 respectively. 58 on. Thus, a rotation of the wiper arm 18 , the adapter unit 50 and the wiper strip 12 in the vertical direction of 5 , ie approximately perpendicular to the axial direction of the wiper blade 10 , only for all elements simultaneously or jointly possible, ie the adapter unit 50 ver binds the wiper arm 18 and the wiper strip 12 as described above jointless with each other.

In 5 is a first enlarged detail view 60 to clarify the clamp connection 66 between clamping pin 56 and clamp tube 57 into which the clamping pin 56 engages, shown. In a second enlarged detail view 70 is an exemplary embodiment of the footer 81 the adapter claw 52 shown. This has a holding element 72 exemplified as a projection on the adapter claw 52 is formed, for engaging in the groove-like recess 28 , At the foot area 87 the adapter claw 58 is an example of a corresponding holding element 84 for engaging in a groove-like recess 85 intended.

According to one embodiment, the support element 53 the adapter claw 52 a locking means 76 trained and on the back bar 24 an associated counter-locking means 74 intended. The locking means 76 and the counter-ratchet 74 are exemplified as longitudinal ribs. These lock in the folded state of the adapter unit 50 with each other, as in 5 shown. On the support element 54 the adapter claw 58 is similar to this designed as a longitudinal rib locking means 76 trained and on the back bar 24 is designed as a longitudinal rib, associated counter-locking means 78 intended.

It should be noted, however, that the number and design of the locking and counter-locking means are described by way of example only and not as a limitation of the invention and may vary application specific. It is also possible to dispense with training appropriate locking and counter-locking means, if the back strip 24 the wiper strip 12 sufficiently strong from the adapter claws 52 . 58 is held. For example, the clamping and Verklemmelemente 51 . 56 respectively. 57 . 59 be formed such that by their jamming with each other, the back strip 24 between the adapter claws 52 . 58 is pinched or pinched and thus in the adapter unit 50 is fixed.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• EP 0141186 B1 [0002]

Claims (10)

Wiper blade ( 10 ) for a windshield wiper, with a wiper strip ( 12 ) and an adapter unit ( 50 ) for fastening the wiper strip ( 12 ) on a wiper arm ( 18 ), characterized in that the wiper strip ( 12 ) a back strip ( 24 ) and at the adapter unit ( 50 ) at least two collapsible adapter parts ( 52 . 58 ) provided by a joint ( 55 ) interconnected headers ( 82 . 88 ) and assigned foot areas ( 81 . 87 ), wherein the adapter parts ( 52 . 58 ) in the folded state of the adapter unit ( 50 ) a fixing element ( 56 . 57 . 51 . 59 ) forming the wiper arm ( 18 ) in the adapter unit ( 50 ) in the axial direction of the wiper blade ( 10 ), the foot areas ( 81 . 87 ) of the adapter parts ( 52 . 58 ) the back strip ( 24 ) of the wiper strip ( 12 ) at least in sections and in the adapter unit ( 50 ) in a predetermined position relative to the wiper arm ( 18 ). Wiper blade according to claim 1, characterized in that the foot areas ( 81 . 87 ) of the adapter parts ( 52 . 58 ) the back strip ( 24 ) of the wiper strip ( 12 ) in the folded state of the adapter unit ( 50 ) comprise claw-like at least in sections. Wiper blade according to claim 2, characterized in that the foot areas ( 81 . 87 ) Locking means ( 76 . 77 ) and on the back strip ( 24 ) associated counter-locking means ( 74 . 78 ) are provided, wherein the latching means ( 76 . 77 ) in the folded state of the adapter unit ( 50 ) with the counter-locking means ( 74 . 78 ) lock. Wiper blade according to claim 3, characterized in that the latching means ( 76 . 77 ) and the counter-locking means ( 74 . 78 ) are formed at least in sections as longitudinal ribs. Wiper blade according to one of the preceding claims, characterized in that on at least a first of the collapsible adapter parts ( 52 . 58 ) at least one clamping element ( 56 ) is provided and at least a second of the adapter parts ( 52 . 58 ) at least one associated Verklemmelement ( 57 ) for clamping the clamping element ( 56 ) having. Wiper blade according to claim 5, characterized in that the clamping element ( 56 ) is a clamping pin and the Verklemmelement ( 57 ) is a clamping tube for receiving the clamping pin. Wiper blade according to claim 6, characterized in that the clamping element ( 57 ) for storing a hook-shaped end region ( 15 ) of the wiper arm ( 18 ) is trained. Wiper blade according to claim 7, characterized in that on at least one of the collapsible adapter parts ( 52 . 58 ) a blocking member ( 59 ) is provided, which is adapted to the hook-shaped end portion ( 15 ) of the wiper arm ( 18 ) in the folded state of the adapter unit ( 50 ) in the axial direction of the wiper blade, wherein the hook-shaped end region ( 15 ) at least in sections between fixing element ( 59 ) and Verklemmelement ( 57 ) is arranged. Wiper blade ( 10 ) according to one of the preceding claims, characterized in that the wiper strip ( 12 ) at least one groove-like recess ( 28 . 85 ), and at least one of the adapter parts ( 52 . 58 ) an associated holding element ( 72 . 84 ) for engaging in the groove-like recess ( 28 . 85 ) is trained. Adapter unit ( 50 ) for attaching a wiper blade ( 10 ) for a windscreen wiper associated wiper strip ( 12 ) on a wiper arm ( 18 ), characterized in that at least two collapsible adapter parts ( 52 . 58 ) provided by a joint ( 55 ) interconnected headers ( 82 . 88 ) and assigned foot areas ( 81 . 87 ), wherein the adapter parts ( 52 . 58 ) in the folded state of the adapter unit ( 50 ) a fixing element ( 56 . 57 . 51 . 59 ), which is adapted to the wiper arm ( 18 ) in the adapter unit ( 50 ) in the axial direction of the wiper blade ( 10 ), the foot areas ( 81 . 87 ) of the adapter parts ( 52 . 58 ) are adapted to a back strip ( 24 ) of the wiper strip ( 12 ) in the folded state of the adapter unit ( 50 ) at least in sections and in the adapter unit ( 50 ) in a predetermined position relative to the wiper arm ( 18 ) to fix.