FR2642716A1 - RACLETTE FOR WIPER DEVICE - Google Patents

Abstract

The invention relates to windshield wipers. To allow the scraper lip, which can oscillate relative to the mounting body 3, to adapt to different operating conditions of the wiper device, the scraper 1 has means 8, 9 with the aid of which one can determine the inclination position of the scraper lip 5 relative to the fixing body 3. This improves the cleaning ability. Main application: windshield wipers for motor vehicles.

Description

Wiper device

  The present invention relates to a device

  windscreen wiper comprising at least one wiper blade

  soot-ice which has a squeegee arranged on a wiper arm coupled to the engine, squeegee which comprises a fastening body which is connected, movable in oscillation, a scraper lip which is supported on the surface

ice cream.

  In wiper devices of this kind which are already known, which are used in particular

  on motor vehicles, a broom wiper arm

  soot-ice is attached to a driven wiper shaft

  to the engine. At the free end of the broom arm

  soot-ice, is articulated a mount to which is

  attached the squeegee of the broom. The raclette itself includes

  me a fastening body that is attached to the mount. A scraper lip of the scraper is connected to the fastener body by a connecting web. The binding soul placed

  in the center position allows the scraper lip to

  oscillation relative to the vertical axis

  cal of the raclette. Depending on the direction of sweeping,

  the scraping lip thus takes different angular positions.

lair or inclination.

  To prevent the squeegee of the wiper from sticking to the windshield under the effect of freezing in cold weather, wiper devices are known in which there is provided a heater on the squeegee.

  DE-A-3 134 083 discloses a device

  tif of wiper in which channels are provided

  in the squeegee for the passage of a heating fluid.

  These heating fluid channels are connected to a source

  this of compressed air or liquid under pressure equipped

a heating device.

  We know, by the utility model DE-GM-1 989

  712, a windscreen wiper device comprising a scraper

  wiper blade which is provided with a heating element

  powered by battery or accumulator. In a form of

  the heating element is arranged in the area

  of the connecting core on the fastening body of the

wiper clip.

  Another wiper device according to DE-B-2 309 902 discloses a wiper blade in

  which the leaf springs arranged on the fixing body

  are used as heating elements. The effect of

  heating of the heating elements is obtained by

  the resistance of the leaf springs to the passage of a

Electric power.

  In wiper devices known in the state of the art, the squeegee lip of the squeegee which is mounted oscillating can certainly be heated but

  it can not be adapted rationally to differences

  operating conditions of the windscreen wiper device

  this. This is detrimental to the cleaning ability of the

wiper device.

  The object of the invention is to give a windshield wiper device of the type mentioned at the beginning a constitution which allows a rational adaptation of the scraper lip to different working conditions of the machine.

wiper device.

  This problem is solved in a device of

  soot-ice of the kind in question in that on the squeegee are arranged means by means of which it is possible to adjust the tilting position of the scraper lip relative to the mounting body. grace

  the means arranged on the squeegee, it is possible to

  to influence the tilting position of the scraper lip

  relative to the fastening body in the desired manner.

  The essential advantage of the new wiper device

  this lies in improving the cleaning effect at high speeds. With arranged means

  on the raclette, the racletse lip can be fixed

  to stiffen the squeegee. The passport

  air on the squeegee can be optimized with the increase of the sweeping frequency by the fact that

  the scraping lip takes on different inclination positions

  its relative to the vertical axis of the squeegee, according to the direction of wiping. Moreover, by acting on the

  adjustment of the inclination position of the scraper lip

  it is possible to reduce the formation of a veil after the

  wise of the raclette. Finally, the longevity of the

  can be improved by the fact that, in the posi-

  the windscreen wiper device, the lip

  cleuse can be maintained in a defined position.

  An advantageous configuration of the invention provides that the means are arranged in the region of a connecting web provided centrally between the

  fixing body and scraping lip.

  An advantageous embodiment provides that between the scraping lip and the fixing body there is provided a hollow body whose volume can be modified by modifying its internal pressure. The body

  hollow, which is preferably closed at one of its ends

  front end and connected at its other end to a unit that produces pressure or depression,

  determines an oscillating movement of the scraping lip

  which is a function of the variation of volume of the hollow body. In particular in the case of large squeegees, it may be advantageous to provide a

  hollow body along each of the two longitudinal edges

naux of the liaison soul.

  The manufacture of the raclette is particularly

  simply when the or each hollow body is formed of a

single piece with the squeegee.

  An advantageous improvement provides that the or each hollow body is made with bellows side walls. The bellows side walls are of a constitution much less stiff than the connecting web

arranged in central position.

  Another embodiment of the invention provides that, in the region of the connecting wing, there is provided an induction coil arranged on a part of

  the squeegee and which cooperates with a metal pole

  on the part of the squeegee that faces him. If the induction coil is traversed by a current, the pole

  metal facing him is attracted by the action

  gnetic thus produced. This causes an oscillating movement of the scraping lip. As a replacement for the metal pole, it is also possible to act on magnetizable particles that are already incorporated in the mixture

  of rubber of the raclette. Similarly, it can be

  since the induction coil cooperates with a magnet pole

  tick of opposite sign, which is constituted by a permanent magnet. An advantageous improvement provides that a device consisting of an induction coil and a metal pole is provided in the region of each of the two

  longitudinal edges of the connecting wing. This is partly

  advantageously in the case of large squeegees

of dimension.

  Another advantage of the assembly consisting of an induction coil and a metal pole provided on the squeegee is to allow to obtain a heating effect of the squeegee by increasing the intensity of the squeegee.

  current. In this case, it is possible to adopt a

  figuration in which a heating current of

  the upper half is superimposed on a signal used to

  adjust the tilting position of the scraping lip.

  With this arrangement, it is possible to achieve an effect of

  improved heating of the raclette.

  Other characteristics and advantages of

  come out of the following description of

  embodiments of the invention which are shown in the drawings. On these drawings,

  Figure 1 is a schematic section of a diagram

  wiper blade of a first form of

  invention; and Figure 2 is a section similar to Figure 1, in the case of another embodiment of the invention. The squeegee wiper 1 shown on

  Figure 1, which belongs to a windscreen wiper device

  this not shown, is attached to a mount 2 which is

  itself fixed by a hinge to a support arm

  lai. For this purpose, recesses 3a, 3b are provided on the attachment body 3 of the squeegee 1 in which the

  frame 2 fits. On the fixing body 3 is

  in the central position, a connecting wing 4 which connects the fixing body 3 to a scraper lip 5. The scraper lip 5 has a scraper edge 6 which is supported on an ice 7 which is to be cleaned. In the region of the connecting web 4, there are hollow bodies 8, 9 which are provided on both sides of the connecting web 4. The hollow bodies 8, 9 extend over the entire length of the squeegee 1 (length which extends perpendicular to the plane of the drawing). On the sides of the hollow body 8, 9 which are opposite the veil of connection 4, there are side walls of the bellows 8a, 9a. While one

  front ends of the hollow bodies 8, 9 is closed.

  it is provided at the other end

  by which the internal pressure can be varied

  8, 9. This unit, which is not shown in the drawing, can be a source of

  pressure or depression. A modification of the pres-

  interior of the hollow bodies 8, 9 also determines

  changing their volume. If, for example, the pressure

  inside of the hollow body 8 rises, the lip rises

  Cleuse 5 describes an oscillation movement in the opposite direction of that of the clockwise and takes a position 14 which is drawn in broken lines. The scraping lip 5 thus forms an angle of inclination 11

  relative to the vertical axis 10 of the squeegee 1. Of

  by feeding the hollow body 9, one can place the

  scraper 5 in a tilting position 12 in

  which the scraping lip 5 forms an inclination angle

  its 13 with respect to the vertical axis 10.

  The supply of the hollow bodies 8, 9 is carried out

  depending on the operating conditions of the

  windshield wiper. For example, if the walking speed rises, we can stiffen the entire raclette 1 in

  increasing the pressure in the two hollow bodies 8, 9.

  The hollow bodies 8, 9 can be fed with

  alternation according to the direction of the wiper sweep.

  The frequency of the pressure change in the hollow bodies 8, 9 can be obtained in a simple manner using a simple microprocessor system, with prior fixing of the edge conditions. By adapting the angle of inclination 11, 13 to the operating conditions of the

  moment of the windscreen wiper device, we give the ra-

  clette 1 better cleaning ability. In particular

  to link, we can optimize the flow of air on the

  1. Furthermore, training can be reduced

  33 possible of a veil following the squeegee 1.

  In the rest position of the sleep device

  soot-ice, the scraper lip 5 can be positioned by the hollow body 8, 9 in such a way that it does not

  do not produce phenomena of early wear or deterioration

  early ration on scraping edge 6.

  The squeegee 15 shown in FIG.

  sede a fastening body 16- along which are provided

  recesses 16a, 16b in which a

  17.A connecting lash 18 provided in a central position

  assembles the attachment body 16 to a scraper lip

  18 on which is formed a scraper edge 20. L'arê-

  The scraper 20 is supported on an ice 21 which is to be cleaned. In the region of the connecting web 18 are provided laterally recesses 31, 32 shaped

  wedge with triangular section. On the part of the

  above the recesses, on the side of the fixing body 16, are mounted induction coils 22,

  23 which are connected to a power supply unit

  than not shown in the drawing. Opposite the induction coils 22, 23 are arranged, on each of the parts of the squeegee which are located on the side of the scraper lip 19, metal poles 24, 25 which cooperate with the induction coils 22, 23. Si for example, the induction coil 22 is traversed by a current, its effect

  magnetic force exerts a force of attraction on the metal pole.

  24 on the scraper lip 19. This causes

  that a tilting motion of the scraper lip 19

  which moves it from the vertical position 26 to the position

  27 The scraper lip 19 thus oscillates about its axis of oscillation, which is approximately in the middle of the connecting web 18, then and it traverses an angle of inclination 28 with respect to FIG.

  the vertical position 26. Similarly, the set 23, 25 de-

  finishes a tilting movement of the scraper lip

  19 which brings him to a position of inclination 29 in the

  the scraper lip 19 is inclined at an angle of

  inclination 30 with respect to the vertical position 26.

  The metal poles 24, 25 can also be

  constituted by magnetizable particles which are

  corporates in the scraper lip 19 in the region of

  liaison veil 18. The mode of action of the form of

  Figure 2 may correspond to that of the

figure 1.

R EV E N D I C A T IO N S

  A windscreen wiper device comprising at least one wiper blade which has a squeegee arranged on a wiper arm

  motor, squeegee which comprises a fastening body

  which is connected, oscillatingly movable, a scraper lip which rests on the surface of an ice cream, characterized in that, on the squeegee (1, 15), means (8, 9, 22, 23) with which the tilting position of the scraping lip (5, 19) can be adjusted

  relative to the fixing body (3, 16).

  2. Wiper device according to the claim

  1, characterized in that the means (8, 9, 22, 23) are arranged in the region of a connecting web (4, 18) provided in a central position between the fixing body

  (3, 16) and the scraping lip (5, 19).

  3. Wiper device according to the claims

  cations 1 and 2, characterized in that between the lip

  cleuse (5) and the fixing body (3) is arranged in

  minus a hollow body (8, 9) whose volume can be

  dified by a change in its internal pressure.

  4. Wiper device according to the claim

  3, characterized in that a hollow body (8, 9) is provided on each of the two longitudinal edges of the veil

link (4).

  5. Wiper device according to the claim

  3 or 4, characterized in that the hollow bodies are

  formed in one piece with the squeegee (1).

  6. Wiper device according to one of the

  Claims 3 to 5, characterized in that the hollow bodies (8, 9) consist of side walls

  (8a, 9a) similar to bellows.

  7. Wiper device according to the claims

  1 and 2, characterized in that at least one lateral recess (31, 32) in the region of the connecting web (18) is provided in the form of a wedge and

  that on a part of the squeegee which delimits the hollow

  (31, 32) is arranged an induction coil (22, 23) which can be supplied with electric current and which cooperates with a metal pole (24, 25) arranged on a

  part of the squeegee opposite him face to face.

  8. Wiper device according to the claim

  7, characterized in that an assembly consisting of an induction coil (22, 23) and a metal pole (24,) is arranged in the region of each of the two edges.

  longitudinals of the connecting web (18).