JPS59171741A - Automatic wiper apparatus - Google Patents

Abstract

PURPOSE:To prevent the operation of a wiper driving part in the state where washing water is not jetted-out, by allowing the wiping operation of the wiper driving part to start first when a raindrop sensor detects a portion of the washing water by the operation of a washer switch. CONSTITUTION:When a washer switch 2 is pressed, a washer driving part 9 operates, and washing water is sprayed in the wiping range on a front window by the right and left wipers. At the same time, the washing water is sprayed also in the detected range in the vicinity of a raindrop sensor 5 on the front window. Therefore, the rain drop sensor 5 operates to operate a wiper driving part 7. When washing water is not sprayed because of trouble, the raindrop sensor 5 dose not operate, and the wiper driving part 7 is not driven. Thus, the front window, wiper blades, etc. can be prevented from being damaged.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is capable of automatically wiping a window glass surface in response to a detection signal from a rain sensor when it rains, and at the same time spraying washer water by operating a washer switch. This invention relates to an automatic wiper device that visually wipes the surface of a window glass even when the windshield is wiped.

As a conventional automatic wiper device, there is one shown in FIG. 1, for example. This automatic wiper device 1 includes a washer switch 2 provided at a location that can be easily operated by the driver;
A washer drive unit 3 that sprays washer water onto the area wiped by the wiper on the window glass when the washer switch 2 is activated, a delay circuit 4 that delays the entire ON signal issued by the operation of the washer switch 2 by a certain period of time, and an operation on the window glass. A raindrop sensor 5 is installed in both places that do not obstruct the view (for example, on the back of the rearview mirror), and is used to eliminate water droplets on the window glass near the installation position, and an on signal from the delay circuit 4 and a raindrop sensor 5 are installed. an OR circuit 6 which outputs a trigger signal when at least one of the detection signals from the dark sensor 5 is input; and a wiper drive unit 7 which operates upon receiving the trigger signal from the wiper drive unit 7 to wipe the window glass. The washer drive unit 3 is composed of a washer pump, a washer tank, a pipe, a nozzle placed on the edge of the window glass, etc.
In addition, the delay time of the delay circuit 4 is determined by taking into account the startup delay of the washer pump and the time required for the washer water to pass through the pipe and reach the glass surface. The drive unit 7 is set to operate. Therefore, when it rains, the wiper drive unit 6 automatically operates based on the detection number 1g emitted from the rain sensor 5 and wipes the surface of the window glass. , Separately, the washer water sprayed onto the window glass by the operation of the washer switch 2 is transferred to the wiper drive unit 7.
is dispelled by automatic operation.

However, in such conventional automatic wiper devices, when the washer switch 2 is activated, the wiper drive section is always activated after a certain period of time, and the wiper arm wipes the entire window glass. , washer pump failure.

If the washer water freezes or there is no washer water on the outside of the pipe or in the washer tank, the washer water will not spray out from the nozzle even if washer switch 2 is activated, and the window glass surface will not be properly wetted. With the wiping operation of the wiper arm, the glass surface is rubbed by the dry sand, dirt, etc. adhering to the glass surface9, and as a result, there is a risk that the glass surface and the wiper blade etc. may be damaged by hot water.

□The present invention has been made in view of these conventional problems, and includes a means for spraying a portion of the washer water to the area of the broken area of the whole crop sensor by operating the washer switch. ,rain? The entire purpose of the present invention is to solve all of the above-mentioned problems by using all the darkness sensors to detect the substantial ejection of washer onto the glass surface, and then causing the wiper drive section to start the full wiping operation.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of an automatic wiper device according to the present invention will be described based on all the drawings.

FIG. 2 is a block diagram of a first embodiment of an automatic wiper device according to the present invention, and FIG. 3 is a perspective view of essential parts of the same embodiment. 2 in FIG. 2, the same parts as those shown in FIG. 1 are given the same reference numerals.

In the automatic wiper device 8, the washer switch 2 is installed at a location that can be easily operated by the driver, and when the washer switch 2 is pressed, an on signal is sent to the raindrop sensor and the nozzle for spraying. 9. This washer drive 89 includes a washer tank, a washer pump, a nozzle, etc.), and E stone wiper wiping ranges 10a, 10a of the front window 10 as shown in FIG.
Nozzles 9a, 9a for spraying a large amount of washer water on
It also includes a raindrop sensor nostle 9b that sprays washer water onto the detection range 10b of the raindrop sensor 5. These nozzles 9a, 9a, 9b are connected to the same washer tank via a washer pump.
When the washer switch 2 is operated, one shell of washer water comes out from each nozzle 9 a r 9 a + 9 b. The nozzle hole of the nozzle 9b for the raindrop sensor Ww is formed to be smaller than the nozzle holes of the other nozzles 9a, 9a, so that the washer water of small b is ejected more forcefully than the nozzle 9b. The detection range Job of the simple sensor 5 is reached. The rain sensor 5 is attached to the back of the rearview mirror and detects a detection range outside the fan-shaped wiper wiper range of the front window 10 and 2.1 Oa.
Facing Ob, all water droplets adhering to the plate 1 cutting edge 10b are detected, and the raised part of the plate 1 is centered as a trigger for the wiper drive s7. The wiper drive unit 7 is constituted by a motor, a wiper arm, a wiper blade, etc., and operates in response to intelligence information from the 1ilu simple sensor 5, and the wiper blades perform a wiping operation over the wiping ranges -0a and 10a, respectively. It is made of bamboo.

Hereinafter, the entire operation of the first embodiment will be explained.

First, when it rains, water droplets adhere to the detection range 10b of the front window 10, so the peak sensor 5 detects this water droplet adhesion, and this causes the wiper and drive unit 7 to operate, and the front window 10 Dispel 1 (Evil Wall 10a,
], Oa is dispelled.

Next, when the dirt on the front window 10 starts to become noticeable during gambling, if the washer switch 2 is fully pressed to operate, the washer drive unit 9 is activated and the wiping area 10a is activated.
, ioa, nozzles 9a, respectively.

The washer water is sprayed from 9a.

At the same time, washer water is vigorously ejected from the raindrop sensor spray nozzle 9b attached to the center of both nozzles 9a, 9a, and reaches the detection range 10b near the rziV hh sensor 5. For this reason, the
detects water damage deposits in the detected area 10b, and the wiper drive unit 7 is thereby actuated to automatically wipe and clean both wiping areas ioa and 10a of the front window 10.

According to the first embodiment, when the washer water is not sprayed from the nozzles 9a, 9a due to a failure of the washer tank of the washer drive unit 9 or when there is no washer water in the washer tank, the raindrop sensor spray nozzle 9b is simultaneously activated.
The washer water is detected within the range 1. Since the liquid is not sprayed onto Ob, the wiper drive section 7 is not operated, and therefore damage to the front window 10, wiper blade, etc. can be prevented. In addition, since the delay circuit 4° OR circuit 6 (see Fig. 1) is not required as in the conventional case, it is possible to eliminate malfunctions of the wiper drive unit 7 caused by, for example, setting an inappropriate delay time. This has the advantage of reducing manufacturing costs by reducing the number of parts.

FIG. 4 is a perspective view of a nozzle used in a second embodiment of an automatic wiper device according to the present invention, and FIG. 5 is a perspective view of essential parts of the same embodiment. In FIG. 5, the same parts as those shown in FIG. 3 are given the same reference numerals, and their explanations will be omitted.

This second embodiment does not provide a dedicated raindrop sensor spray nozzle 9b (see Fig. 3) as in the first embodiment, but improves the nozzle that sprays washer water into the wiper wiping range, Features include a sensor spray nozzle and a sensor spray nozzle for Ak.
W.

In Fig. 4, 11 is a dual-purpose nozzle, which is made into a bifurcated shape by closing the center of the end of the metal vibrator.
The king nozzle part 11a that sprays washer water to one of the wiping ranges 10a and the detection range 10 near the raindrop sensor 5
a raindrop sensor spraying nozzle part 11b that spouts washer water toward b, and a through hole 1 of the nozzle part 11b.
2b is wider than the through hole 12a of the king nozzle portion 11a. As shown in FIG. 5, this dual-purpose nozzle 10 is arranged at the base of the front window 10 in front of the driver's seat. Note that the other configurations are similar to those of the first embodiment.

According to this second embodiment, the washer water guided to the dual-purpose nozzle 10 is divided and is always jetted from the king nozzle capital 11a and the raindrop sensor jet wall nozzle part 11b, so that the washer water is introduced into the detection range 10b. Water splashes on it, but dispel range 1B
There is no problem with A10a, and malfunction of the wiper drive unit 7 can be more reliably prevented than in the first embodiment. Further, since the number of nozzles is reduced, there is an advantage that the pipe of the wiper drive section 7 can be left as is.

In each of the above embodiments, the washer drive unit 9 is provided with the nozzle 9b or the nozzle part 12b, but instead of this, the mounting position of the cloth separator 5 or its It may be configured such that the entire handling detection range is changed so that the entire application of washer water in the wiping range 10a can be detected.

As explained above, according to the present invention, since the closing means is provided, the wiper drive unit does not perform the wiping operation until after all adjustable sensors have detected the entire water bottle layer on the actual glass surface due to washer ejection. As a result, it is possible to completely prevent malfunctions such as the wiper drive section operating without washer water being discharged due to a failure of the washer moving section or the like. As a result, it has the advantage of preventing damage to the window glass surface and wiper blade. Furthermore, since there is no need for delay circuits, OR circuits, etc. as in the prior art, the manufacturing cost can be reduced due to the reduction in the number of parts.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of a conventional automatic wiper device, Fig. 2 is a block diagram of a first embodiment of an automatic wiper device according to the present invention, and Fig. 3 is a perspective view of main parts of the same embodiment. Fig. 4 is a perspective view of a nozzle used in the second embodiment of the automatic wiper device according to the present invention, and Fig. 5 is a perspective view of main parts of the same embodiment. 2. Washer switch, 5. Sono sensor, 7.
Wiper drive unit, 8... automatic wiper device, 9 washer drive unit with IJR solid sensor spray nozzle, 9a... king nozzle, 9b... raindrop sensor spray nozzle, 10...
Front window, lOa... wiper clearance, 10c
゛°゛Test range of raindrop sensor/su5, 11... Dual-purpose nozzle, ], 1a... King nozzle part, 11b... Raindrop sensor 115t ladder nozzle part, 12a, 12b...
Through hole. Figure 2 Figure 3 Figure 419 (1 1

Claims (1)

[Claims] When the washer switch is activated, a washer drive unit is equipped with a complete nozzle that sprays washer water in the wiper area of the window glass, a double-opening sensor that detects water droplets adhering to the window glass, and a detection signal from the peak sensor. In an automatic wiper device comprising a Ray-4 drive unit that operates when the washer switch is activated and wipes away the window glass, a portion of the washer water is also applied to the detection range of the raindrop sensor when the washer switch is activated. An automatic wiper device characterized by being provided with means for spraying.