FR2668743A1 - WIPER BLADE FOR WINDSCREEN WIPER SYSTEMS. - Google Patents

Abstract

The invention relates to a wiper blade for windscreen wiper systems, with a stable base body which has an open channel, continuous along the entire length of the base body, having an approximately T-shaped section and intended for receiving a soft rubber squeegee, the foot region of which also has an approximately T-shaped cross-sectional shape, the boundary faces (8) of the channel deviating in the form of elbows towards the open mouth region of the channel, and terminating in rounded leg portions (13), against which a free-moving part of the squeegee connecting to the T-profile, and shoulders (11) projecting from both sides of this part and serving for the bearing against the leg parts (13), are alternately applied in positive engagement, during the reciprocating pivoting movement of the wiper blade, against a delimiting face (8). The wiper blade according to the invention is characterized in that the squeegee has in its movable part, between the bounding faces (8) of the channel, at least two superimposed longitudinal grooves (14 and 15), present in each side at the same height in cross section, which promote bending of the squeegee until it is applied against the boundary faces (8).

Description

Wiper blade for wiper systems The present invention

  relates to a wiper blade for wiper systems, with a stable base body which has a

  open channel, continuous over the entire length of the base body, present

  both a form of section approximately in T and intended to receive

  a soft rubber squeegee whose foot region also has

  an approximate T-shaped section, the delimiting faces

  the channel deviating in the form of elbows in the direction of the

  open mouth of the canal, and ending in parts of rounded feet, against which a free-moving part of the squeegee connecting to the T-profile, and shoulders projecting from both sides of this part and serving to support against

  parts of the feet, are alternately applied in posi-

  tif, during the back and forth pivoting movement of the wiper blade

  ice, against a delimiting face.

  German patent DE-C 37 08 719 discloses a wiper blade which receives a squeegee in a base body, between two delimiting faces of a receiving channel. The squeegee has, on a lower part with free movement , lateral shoulders

  by which, during the back and forth pivoting movement of the

  lai, it leans against the delimiting faces of the basic body

which spread in elbows.

  So that the movable lower part of the squeegee is fully applied against the respective lateral delimitation face, it must not have very high bending stability in this direction; but this implies either that the movable part is narrow, or that it consists exclusively of a very soft material These

  two configuration possibilities bring the disadvantage that the

  clette may be slightly deformed or even damaged during

  displacement as a result of resistance on the ice, or else does not

  does not have sufficient sweeping force.

  The object of the present invention is to provide a wiper blade.

  ice cream of the type mentioned in the introduction of a squeegee that can be

  moved on a sweeping ice with a stable pressure force

sée, and therefore with a low noise.

  According to the invention, this object is achieved by the fact that the ratio

  key present in its movable part, between the delimiting faces of the channel, at least two superimposed longitudinal grooves, present on each side at the same height in cross section, which promote the bending of the squeegee until it is applied against the faces of delimitation. Thanks to the two longitudinal grooves made in the squeegee, which facilitate and control the application of the squeegee against the delimiting faces deviating in bends from the base body of the wiper blade, the transmission of the force of sweeping of the base body on the squeegee is stabilized, and thus an always constant quality of sweeping is obtained. of sense of

  displacement, when the squeegee is moved by a delimitation face

  tion of the base body against the other delimiting face of the latter

  deny, is done in a finer way, and therefore without noise.

  A further improvement in the progress of the squeegee tilting movement is obtained by the fact that the most distant longitudinal grooves of a sweeping glass produce,

  by their configuration, less resistance to bending of the

  mobile tie than the longitudinal grooves closer to the glass,

  so that the tilting movement of the squeegee always starts

  days in the tilting rib between the long grooves

  more distant, and is followed in a fluid manner by the

  tilting squeegee between the other long grooves

  For this purpose, the most distant longitudinal grooves

  ice can advantageously have a greater depth

groove deur.

  The support of the movable part of the squeegee against the delimiting faces of the basic body of the wiper blade, support which the longitudinal grooves facilitate in a decisive manner, makes it possible to produce the squeegee with a wider section in the region of

  scraper edge resting on the glass, which allows better ab-

  sorption of the forces which appear between the wiper blade and the wiper For this purpose, the lateral faces of the squeegee may even have respective mutually opposite concave bulges, without this jeopardizing the stability of the squeegee, so

  that a greater angle of incidence of the squeegee is obtained compared to

  port to the ice, thanks to which a greater pressure force of the

  the wiper blade can act on the squeegee, perpendicular to the glass. An exemplary embodiment of the invention is shown in the accompanying drawings, in which: Figure 1 is a cross-sectional view of a brush

  wiper comprising a basic body and a squeegee, in position

  upright inversion of direction of travel,

  Figure 2 shows the squeegee of Figure 1 in a pre-

  first bending phase, and Figure 3 shows the squeegee in a next bending position, in which it sweeps an ice by being applied

against the base body.

  Figure 1 shows in cross section part of a ba-

  wiper lai 1 of a wiper system not otherwise re-

  shown, the wiper blade 1 comprising a stable base body 2 and a squeegee 5 which is received, by a foot region 4, in an open channel 3 of the base body The foot region 4 of the squeegee 5 has a T profile, and is thus fixed in position in the

  T-shaped channel 3, and blocked with little vibration by a res-

  blade outlet 6 Part 7 of the squeegee 5, which connects to the re-

  foot region 4, is in free movement between two delimiting faces 8 of the channel 3 of the base body 2, and it ends in a scraper edge 9 which is pivoted on a glass 10, thereby removing the water and dirt A respective shoulder 11 protrudes transversely from

  on either side of the free movement part 7 of the squeegee 5.

  The delimiting faces 8 of the channel 3 deviate in the form of elbows in the direction of the open mouth region 12 of the channel, and are

  end in parts of rounded feet 13 The squeegee 5 is

  then in positive engagement by its shoulders 11 against its parts -

  feet 13 during its movement, on the one hand in the directions of pivot-

  of the wiper blade 1, and on the other hand perpendicularly

with ice 10.

  This application in positive engagement of the squeegee 5 against the delimiting faces 8 is favored by the fact that the squeegee has, in its free movement part 7, at least two longitudinal grooves 14 and 15 on each side, which face each other in cross section As also shown in Figures 2 and 3, the longitudinal grooves 14, the furthest from the glass, include between them a tilting rib 16 narrower than that between the longitudinal grooves 15, closer to the glass 10 , so that the squeegee 5, during its displacement, after having left a substantially perpendicular displacement direction reversal position (FIG. 1), first switches between the two

  first longitudinal grooves 14 (FIG. 2), then also tilts

  between the longitudinal grooves 15 (Figure 3) and applies in-

  completely against the delimiting face 8 This movement command

  application ment guides the squeegee 5 which has

  little resistance and little noise During the pivoting movement

  pour the wiper blade 1, the squeegee 5 applies according to the

  same process against the opposite boundary face 8.

  The pressure force by which the wiper blade 1 acts

  via the foot parts 13 on the squeegee 5 di-

  rection of the glass 10, can be further increased by the fact that the lateral faces 17 of the free-moving part 7 have concave bulges 18 below the shoulders 11, so that

  obtains a greater angle of incidence 19 of the squeegee 5 compared to

  ice port 10, of which the ice normal 10 (i.e.

pressure force) is high.

Claims (4)

  1 Wiper blade for wiper systems, with a stable base body which has an open channel, continuous over all   the length of the basic body, having an approximate cross-sectional shape   matively in T and intended to receive a soft rubber squeegee   the foot region of which also has a cross-sectional shape   approximately in T, the delimiting faces of the channel diverging in   form of elbows in the direction of the open mouth region of the   nal, and ending in parts of rounded feet, against the   which a free-moving part of the squeegee connecting to the T-profile, and shoulders projecting from both sides of this part and serving to support against the parts of the feet, are alternately applied in positive engagement, during the movement pivoting back and forth of the wiper blade, against a delimiting face, characterized in that the squeegee (5) has in its movable part (7), between the delimiting faces ( 8) of the channel (3),   at least two superimposed longitudinal grooves (14 and 15), pre-   on each side at the same height in cross section, which makes   favor the bending of the squeegee (5) until it is applied against the delimiting faces (8).   2 Wiper blade according to claim 1, characterized in that the longitudinal grooves (14), the furthest from a window (10) to be swept, produce, by their configuration, a   less resistance to bending of the mobile part (7) than the spokes   longitudinal ribs (15), closer to the ice.   3 Wiper blade according to claim 2, characterized in that the longitudinal grooves (14), the furthest from a   glass (10), have a greater groove depth.   4 Wiper blade according to claim 1 or 2, character-   laughed in that the squeegee (5), near a glass (10) to sweep   and below the shoulders (11), is configured, in cross section   dirty, with concave bulges (18) on both sides.