JPS6343177Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a washer control device that controls the drive of a washer that sprays cleaning liquid onto the window surface of an automobile.

Generally, when a washer is driven to spray cleaning liquid at a predetermined location on the window surface during wiper operation, it is important to ensure that the cleaning liquid sprayed by the wiper blade is used effectively and that the cleaning liquid does not obstruct visibility. You need to make sure that you are not exposed.

The present invention has been developed with these points in mind, and provides a wiper-linked washer control device that is capable of spraying cleaning fluid onto the window surface at optimal timing in synchronization with the wiper operation. be.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 shows the circuit configuration for controlling the drive of the washer in synchronization with the wiper operation. Using the vehicle battery BATT as a power source, the drive of the wiper motor M1 is controlled according to the operation status of the wiper switches WIP and SW. wiper drive unit 1;
A washer drive unit 2 that controls a washer drive motor M2 installed on the right side with respect to the window surface and a washer drive motor M3 on the left side in synchronization with the movement of the wiper when the washer switch WASH SW is turned on. It is made up of

The wiper drive unit 1 includes a wiper switch.
When WIP/SW is placed in the LO position, battery power is applied to the circuit on the low-speed winding side of wiper motor M1, and when it is placed in the HI position, battery power is applied to the circuit on the high-speed winding side of wiper motor M1. It's becoming like that. Also, when the wiper switch WIP/SW is randomly placed in the OFF position, the auto-park function by relay switch RL1, which is made up of a relay plate (see Figure 2), is activated and the wiper blade is brought to the normal position. After connecting the S contact for auto park to the ground side and driving the wiper motor M1,
The contact connection is switched to the _B1 contact side to stop the wiper motor M1.

Further, the washer drive unit 2 drives the left washer motor M3 via the relay switch RL1.
Relay switch RL is connected to the battery BATT on the side and also consists of a relay plate.
A battery BATT is connected to the right side washer motor M2 via M2. The relay switch RL1 has a double switch structure in which when the S- _B1 contacts are short-circuited, the _B1 -L contacts are also short-circuited.

Fig. 2 shows an example of the configuration of a relay plate, which is provided to rotate in synchronization with the wiper motor M1, has a notch 3 formed in a part of its periphery, and has a disc-like shape held at ground potential. A first plate 4 according to the invention, and an arm-shaped arm provided with a predetermined gap around its outer periphery so as to rotate together with the first plate 4, and a protrusion 5 corresponding to the notch 3 is formed. It consists of a second plate 6.
Further, on the fixed side, the opposing contacts L and _B1 of the relay switch RL1 are short-circuited by the second plate 6, and the relay switch RL2 is located at a position corresponding to the second plate 6 separated by 180 degrees from the second plate 6. Counter contact
B ₂ and R are respectively provided, and an S contact for auto-parking is provided corresponding to the protrusion 5 of the second plate 6. The second plate 6 has an arm portion on each side of the second plate 6 having the protrusion 5 as its center, which is a portion corresponding to 1/4 of the circumference, and a wrap margin of an angle θ is added to each arm portion.

The operation of the washer control device according to the present invention constructed as described above will be explained below with reference to FIG.

3a to 3f show the timing of spraying cleaning fluid from two-point washer nozzles (not shown) provided on the left and right sides of the window 7 in sequence in conjunction with the operation of a single-blade wiper.

Now, when the wiper switch WIP/SW is in the OFF position and the relay plate is in the state shown in Fig. 2, the L is turned on by the second plate 6.
Since the -B ₁ -S contacts are short-circuited, the wiper motor M1 is not driven at all, and the wiper blade 8 is stopped at the fixed position shown in FIG. 3a. Then,
When the wiper switch WIP/SW is placed in the LO or HI position, battery BATT is applied to the circuit of the wiper motor M1 to drive it. At this time, if the washer switch WASH SW is in the on state, the battery BATT is input to the circuit of the washer motor M3 because the L-B ₁ contacts are short-circuited by the second plate 6 of the relay plate. As shown in FIG. 3a, the wiper blade 8 moves from the left washer nozzle to the window 7 while the wiper blade 8 reaches position A when the second plate 6 rotates 90°-θ from its home position.
A jet of cleaning liquid is applied to the surface. Further, as shown in FIG. 3b, while the wiper blade 8 reaches position B from position A to position B when the second plate 6 is rotated by 90° + θ, the wrap distance of the second plate 6 causes The B ₁ contact and the B ₂ -R contact are both short-circuited, so that both the washer motors M3 and M2 are driven, and the cleaning liquid is simultaneously jetted from each of the left and right washer nozzles. Further, the rotation of the second plate 6 progresses until the wiper blade 8 reaches position C from position B when the second plate 6 rotates by 270°-θ, as shown in FIGS. 3c and d, respectively. During this period, only the contacts B ₂ and R are short-circuited by the second plate 6, so that only the washer motor M2 is driven, and cleaning liquid is sprayed from the right washer nozzle. Furthermore, as the rotation of the second plate progresses, as shown in FIG. L-
Both the B ₁ contact and the B ₂ -R contact become short-circuited, which causes the washer motors M3 and M2 to
Both of the washing nozzles on the left and right sides are injected at the same time. Furthermore, as the rotation of the second plate 6 progresses, as shown in FIG. As a result, only the L- _B1 contacts are short-circuited, so that only the washer motor M3 is driven, and cleaning liquid is sprayed from the left washer nozzle. Here, one rotation of the second plate 6 causes one reciprocation of the wiper blade 8. In addition, the wiper switch may be activated at a time other than when the wiper blade 8 is in the normal position.
When the WIP SW is put in the OFF position, at that point the S for auto park on the second plate 6 is
The protrusion 5 on which the contact is provided is the first plate 4
Because the wiper motor M1 is in contact with the first plate 4, the wiper motor M1 continues to be driven, and when the protrusion 5 separates from the first plate 4, the S- _B1 contacts are short-circuited and the wiper motor M1 stops, so that the wiper blade 8 is always driven. is designed to stop at a fixed position.

As described above, in the washer control device according to the present invention, the wiper blade is synchronized with the movement of the wiper by one blade, and the wiper blade is moved to the central overlap area of the wiping area of the wind surface, that is, the second plate of the relay plate. When the wiper blade is in an area corresponding to the overlap area formed, the cleaning liquid is injected simultaneously from each wash nozzle on the left and right sides, and when the wiper blade is in the left or right side of the overlap area, the cleaning liquid is injected only from the wash nozzle on the corresponding side. The cleaning liquid can be sprayed onto the window surface at the optimum timing according to the movement of the wiper, and the sprayed cleaning liquid can be used effectively to effectively clean the window surface. It has the excellent advantage of being able to

[Brief explanation of drawings]

FIG. 1 is an electrical wiring diagram showing an embodiment of a washer control device according to the present invention, and FIG. 2 is a plan view showing an example of the configuration of a relay plate in the same embodiment.
FIGS. 3a to 3f are diagrams each showing the spraying state of the cleaning liquid according to the movement of the wiper blade. 1... Wiper drive unit, 2... Washer drive unit, 4... First plate (fixed), 6... Second plate (movable), 7... Window, 8... Wiper blade, M1... Wiper motor, M2...Right side washer motor, M3...Left side washer motor, WIP・SW...Wiper switch, WASH・
SW...Watch switch.

Claims (1)

[Scope of utility model registration request] A single-blade wiper drive unit with an auto-park mechanism and a relay plate in the auto-park mechanism short-circuit and open the first pair of contacts that connect the battery power source to the circuit of the left washer motor, and It consists of a washer drive unit that short-circuits and opens a second counter contact that connects the battery power supply to the circuit of the right washer motor, and when the wiper blade is in a fixed position, the auto park contact and the first counter contact are connected to each other. The first counter contact is provided at a position that is short-circuited together by the relay plate, and the second counter contact is provided at a position separated by 180 degrees from the first counter contact, and the relay plate has a semicircular shape. A washer control device characterized in that a wrap margin corresponding to the opening degree θ is provided at each end of the washer.