DE1680194A1 - Wiper system for windows of vehicles - Google Patents

Description

R. ND 21 Ki / Ep
March 11, 1968

Attachment to

Patent -. ,,

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NIPPON DENSO KABUSHIKI KAISHA, Kariya , Aichi (Japan)

Wiper system for windows of vehicles

The invention relates to a wiper system for windows of vehicles, with at least one of a drive motor to and fro movable wiper, which has a wiper blade with an elastically deformable wiper lip and a support arm for the wiper blade, which with its end facing away from the wiper blade by at least approximately axis arranged parallel to the pane to be cleaned

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Nippon Denso KK K. ND Jl Ki / Kp

Kariya, Aichi

is pivotally connected to a drive member and under the influence a spring that swivels the support arm against the windshield and presses the wiper lip against the windshield.

In the known systems of this type, the wiper blades with their Wisehllppen not only during operation, but also in the parking position pressed against the window and thus heavily stressed. With intense exposure to sunlight, heat or cold, they even experience a longer-lasting or even permanent one Deformation. If the wipers are then put back into operation, they can only insufficiently clean the windows. In winter there is the risk of the wiper lips freezing to the windows and preventing the wipers from moving back and forth.

The invention is based on the object with simple means to relieve the wiper lips in the parking position of the v / ischer and to eliminate the risk of plague freezing of the wiper lips on the windshield. If necessary, the funds should also be applied retrospectively can be and also be designed so that they place additional stress on the storage of the v / ischer as little as possible.

This object is achieved according to the invention in that the drive of the wiper has an adjusting device which acts on the support arm and which, in the parked position of the wiper, moves the support arm against the force the spring is pivoted and thereby reduces or cancels the contact pressure of the wiper lip.

A particularly simple design results when the adjusting device has a ramp that protrudes into the path of movement of the support arm and is firmly supported perpendicular to the disk, on which the support arm when the parking position is reached.

The ramp can be arranged in a stationary manner, so there is none other than it further parts to achieve the intended deflection of the

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Nippon Denso KK R. ND 21 Ki / Ep

Kariya, Aichi

Bracket are required. The ramp can also be used with the appropriate Arrangement of the drive members can also be attached a little far from the pivot axis of the support arm, so that the in the Deflection of the support arm occurring additional forces only proportionally are small and only insignificantly burden the joints and the mounting of the wiper.

It is particularly advantageous if, according to a further proposal of the invention, the adjusting device is ineffective during the wiping operation and automatically comes into effect when the wiper is switched off. λ

This arrangement can be particularly advantageous in systems with pendulum wipers in which the parking position is reversed the wiper collapses. This reversal position is then passed through by the wipers during operation without the wiper lips moving lift off the pane. This way you avoid the The wiping field is reduced by the swivel angle that the support arm has from the beginning of the adjustment device becoming effective until it is reached the reversal if necessary.

In the drawing are two embodiments of the invention shown schematically. Show it:

Fig. 1 is a partial view of the first embodiment on a reduced scale Depiction,

FIG. 2 shows the section along line II-II in FIG. 1 in relation to FIG. enlarged view,

Fig. 3 shows the section along line III-III in Fig. 1,

Fig. 4 shows the section along line IV-IV in Fig. 1,

Fig. 5 is a partial view of the second embodiment,

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Nippon Densο KK R. ND 21 Ki / Ep

Kariya, Aichi ^

Fig. 6 shows the section along line VI-VI in Fig. 5 in the operation of the Wischers, and

FIG. 7 shows a sectional view corresponding to FIG. 6 with switched off Wiper.

The system according to FIG. 1 is used to clean a windshield and has two wipers 11, of which only the one for the sake of simplicity one is shown. The wiper 11 has a wiper blade 12 with an elastically deformable wiper lip 13, which sits on a support arm 14, fc which is pivotably connected to a hub 16 about an axis 15. The hub 16 is firmly connected to a shaft 17, which is below the disk 10 is rotatably and immovably mounted in a body wall 18. One on the hub 16 and the support arm 14 engaging Spring 19 pivots the support arm against the window 10 and presses the wiper lip Ij5 with what is necessary for proper work Force on the pane.

The shaft 17 is connected via a gear (not shown) to a drive motor, also not shown, which oscillates the wiper back and forth between an inner and an outer reversing position during operation. In the drawing, the outer reversal position of the wiper is shown with full lines. When W off of the system, a mechanism, also not shown swivels the wiper in a parking position, which is outside the wiping area and is indicated with dash-dotted lines.

When pivoting into the parking position, the support arm 14 runs on a Ramp 20 which is attached to the body wall 18. The ramp 20 is dimensioned so that the support arm 18 slides a piece Pivoted far away from the window and thereby the wiper lip Ij5 the amount S is lifted off the disc (Fig. 3). Therefore is at resting plant dfe wiper lip completely relieved, so that they

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Nippon Denso KK R. ND 21 Ki / Kp

Kariya, Aichi

is spared and immediately flawless when the system is switched on is working.

In the embodiment according to FIGS. 5 to 7, the one wiper moved during operation to the outer reversal position shown, which is also the parking position of the wiper. To lift the wiper lip 13 from the window 10, a plunger 21 is provided here, which is connected to the armature 22 of an electromagnet 23. This one has an excitation winding 24 which is connected in parallel to the armature 25 of the drive motor. Both consumers are from one power source 26 fed via two lines 27 and 28, one of which by an arbitrarily operable hand switch 29 and the other monitored by a limit switch 30 temporarily opened by the motor when the wiper passes through the outer reversing position is. A spring 31 acts on the plunger 21, which counteracts the pull-in force of the electromagnet and pushes the plunger 21 into the Seeks to push in the path of movement of the support arm 14.

When the switch 29 is closed, the motor is switched on and the Electromagnet energized, so that the plunger 21 is pulled out of the path of movement of the support arm 14 and the wiper is unimpeded outer inversion can go through. When opening the switch the motor continues to run until the wiper reaches the outer reverse position and the limit switch 30 is opened by the motor will. The wiper then remains in the outer reverse position stand, in which the electromagnet 23 is also de-energized. the Spring 31 then leads the plunger 21 back into the starting position (Piß. 7), in which it pivots the support arm 14 and the wiper lip lifts off the disc.

109839/0349

Claims (1)

Nippon Denso KK R. ND 21 Ki / Ep Kariya, Aichi Q. Expectations 1. Wiper system for windows of vehicles, with at least one of a drive motor reciprocable wiper, the one Has a wiper blade with an elastically deformable wiper lip and a support arm for the wiper blade, which with its from the wiper blade facing away by an at least approximately parallel to the end - Cleaning disc arranged axis pivotable with a drive member is connected and is under the influence of a spring which pivots the support arm against the window and thereby the wiper lip presses against the window, characterized in that the drive of the wiper is an adjusting device acting on the support arm (14) has, which in the parked position of the wiper pivots the support arm against the force of the spring (19) and thereby the The contact pressure of the wisehlippe (13) is reduced or canceled. 2. Installation according to claim 1, characterized in that the adjustment, w device has a ramp (20) which protrudes into the path of movement of the support arm (14) and is firmly supported perpendicular to the disk, on which the support arm runs upon reaching the parking position. J5. Plant according to claim 1 or 2, characterized in that the Adjusting device is ineffective during wiper operation and comes into effect automatically when the wiper is switched off. - 2 109839/0349 Nippon 1> .ίηπο KK R. ND 21 Ki / Ep Kariya, Λichi Ά 4. Plant according to claim 5 »characterized in that the adjusting device an electromagnet (2j5) which, when energized, has an adjusting element (21) against the force of a return spring (31) pulls out of the path of movement of the support arm (14). 5. System according to claim 4, with an electric drive motor for moving the wiper or wipers back and forth, characterized in that that the excitation winding of the electromagnet (25) is connected in parallel to the drive motor of the wiper or wipers. 109839/0349 Blank page