JPS6212693Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an intermittent window wash discharge device for a vehicle.

2. Description of the Related Art In conventional vehicles such as automobiles, when a windshield washer is operated when the wipers are operated, there is a range of operating angles in which the washer liquid is splashed away by the wiper. Therefore, the washer fluid sprayed within this wiper operating angle range is wasted without cleaning the glass surface.
The wiping efficiency of the washer liquid becomes very poor.

This device is an intermittent window wash dispensing device that stops the ejection of washer liquid within the operating angle range of the wiper where the washer liquid is thrown away by the wiper, thereby allowing the washer liquid to be used economically and reducing the size of the window wash tank. The purpose is to provide.

This invention will be explained below with reference to drawings showing embodiments. Note that in each embodiment, the same components are given the same numbers and explained. FIG. 1 shows a first embodiment of this invention. In the figure, reference numeral 1 denotes a potentiometer, which is attached to a pivot shaft 3 of a wiper arm 2. 4 is a wiper plate, and 5 is a window glass. 6 is a washer liquid tank that communicates with a nozzle 8 through a pipe 7. A washer motor 9 is attached to the pipe 7. When the washer motor 9 rotates, the washer liquid in the washer liquid tank 6 flows into the nozzle 8.
It is sprayed from the windshield 5 to the windshield 5.

Potentiometer 1 is parallel to comparator 1
0 and 11 to an AND circuit 12, and the AND circuit 12 connects the relay 1 of the circuit 14 of the washer motor 9 via a common emitter transistor 13.
5. 16 is the washer motor 9
This is the activation switch. The diode 17 also prevents back electromotive force generated in the coil of the relay 15. Here, the rotation angle of the pivot shaft 3 is α and β shown in Fig. 1.
Assuming that the washer liquid from the nozzle 8 is blown away by the wiper when the condition is between (β>α),
Comparator 10 is ON when below β, OFF when β and above, comparator 11 is OFF when below α,
It is set to turn ON at α and above. As a result, the potential of the line 18 between the AND circuit 12 and the common emitter transistor 13 and the relay 15
The operation is as shown in the table in Figure 2.

That is, when the operating switch 16 is in the ON state, the relay 15 is turned ON and the washer motor 9 is activated, and the washer is discharged from the nozzle 8 when the rotation angle of the pivot shaft 3 is less than α and when it is β or more. The liquid is sprayed onto the window glass 5. When the rotation angle of the pivot shaft 3 is between α and β, the relay 15 is turned OFF, the washer motor 9 is stopped, and the ejection of washer liquid from the nozzle 8 is stopped.

FIG. 3 shows a second embodiment of this invention. In the figure, an arm 2 is attached to the shaft 21a of the wiper motor 21.
One end of the arm 22 is fixed, one end of a link rod 23 is pivotally connected to the other end of the arm 22, and the other end of the link rod 23 is attached to the other end of an arm 24 which is attached at one end to the pivot shaft 3 of the wiper arm 2. It is pivoted. A contact piece 25 having a predetermined shape is provided on a part of the link rod 23. When the wiper motor 21 rotates, the link rod 23 and the arm 2
4, the pivot shaft 3 reciprocates as shown by arrow P in FIG. 3, and the wiper arm 2 swings. Reference numerals 26 and 27 indicate microswitches which are connected in series to the washer circuit 14. One of the micro switches 26 and 27 contacts the contact piece 25 to turn off the washer circuit 14 when the pivot shaft 3 rotates from angle α to β, and the other micro switch contacts the contact piece 25 when the pivot shaft 3 rotates from angle β to angle α. When rotating, it contacts the contact piece 25 and activates the washer circuit 14.
Turn off. The rotation angle of the pivot axis is less than α and β
In this case, both microswitches 26 and 27 are separated from the contact piece 25, and the circuit 14 is turned on. That is, when the rotation angle of the pivot shaft 3 is between α and β, the wash motor 9 stops and no wash liquid is ejected.

FIG. 4 shows a third embodiment of this invention. In the figure, a circular printed circuit board 31 is attached to the shaft 21a of the wiper motor, and the printed circuit board 31 has partially arc-shaped conductive parts 32a, 32b, and inside thereof, a partially arc-shaped conductive part 33a,
33b are arranged at intervals in the circumferential direction corresponding to the angle β-α=γ. Washer circuit 1
4 has conductive parts 32a, 32b and conductive parts 33a, 3.
3b are provided with contactable brushes 34 and 35, respectively. Also, conductive parts 32a, 33a and conductive parts 32b, 33 are provided in the non-rotating parts of the wiper motor.
A brush 36 that can come into contact with b is attached in an insulated state. As in the second embodiment, the arm 22 attached to the wiper motor shaft 21a and the arm 24 attached to the pivot shaft 3 of the wiper arm 2 are connected by a link rod 23.

In FIG. 4, when the operating switch 16 of the washer circuit 14 is ON and the wiper motor is rotating, the printed circuit board 31 rotates in the direction of arrow Q, and while the conductive parts 32a and 33a are in contact with the brush 36, the washer motor is turned on. 9 is activated and the washer fluid is injected. The rotation angle of the printed circuit board 31 is α
When it exceeds this point, the brush 36 comes off the conductive parts 32a, 33a, and the washer motor 9 stops rotating. When the rotation angle of the printed circuit board reaches β, the washer motor 9 is activated again to inject the washer liquid. That is, the rotation angle of the printed circuit board 31 is γ=β
During the period -α, the washer motor 9 stops.

As mentioned above, this idea is based on a switching system that stops the washer motor and interrupts the spraying of washer fluid within the operating angle range of the wiper where the washer fluid sprayed onto the glass surface by the washer motor when the wiper is activated is blown away by the wiper. Since the mechanism is provided in the washer circuit, the washer fluid can reach the glass surface without waste. That is, since the washer fluid is used effectively, the washer fluid tank can be made smaller than before, and the washer fluid needs to be replenished less frequently than before.

[Brief explanation of drawings]

The drawings show an embodiment of this invention, and FIG.
An explanatory diagram of the embodiment, FIG. 2 shows an operation table of the components of the first embodiment, and FIGS. 3 and 4 respectively show the operation table of the components of the first embodiment.
It is an explanatory diagram of an example and a third example. 2...Wiper arm, 3...Pivot axis, 1
4...Watcher circuit, 15...Relay, 26,
27...Micro switch.

Claims (1)

[Scope of utility model registration request] The washer circuit is equipped with a switching mechanism that stops the washer motor and interrupts the spraying of washer fluid within the operating angle range of the wiper where the washer fluid sprayed onto the glass surface by the washer motor when the wiper is activated is flicked away by the wiper. Intermittent window wash discharge device for vehicles.