JPH0481859U - - Google Patents

Description

[Brief explanation of drawings]

FIG. 1 shows a wiper control device 6 according to an embodiment of the present invention.
FIG. 2 is a block diagram showing the configuration of a wiper control device 81 according to another embodiment of the present invention, and FIG. 3 is a block diagram showing the configuration of a wiper control device 81 according to yet another embodiment of the present invention. 4 is a block diagram showing the configuration of a wiper control device 101 according to another embodiment of the present invention, FIG. 5 is an electric circuit diagram of the basic wiper control device 1, and FIG. A block diagram showing the configuration of another basic wiper control device 11, FIG. 7 is a configuration of a typical conventional wiper control device 1a in which an auto wiper control circuit 21 is added to the wiper control device 1 shown in FIG. FIG. 8 is a block diagram showing the configuration of another conventional wiper control device 11a in which an auto wiper control circuit 41 is added to the wiper control device 11 shown in FIG. First block diagram showing the configuration of a wiper control device 51 of the prior art.
FIG. 0 is a block diagram showing the configuration of a wiper control device 1b for explaining the problems of the prior art. 61, 81, 91, 101... Wiper control device, 62... Wiper motor, 63, 83, 93...
Wiper switch, 64... Battery, 65... Power line, 66... Cam switch, 71, 82,
92, 102...Auto wiper control circuit, 72...
...Auto wiper switch, 73...Raindrop sensor,
75...processing circuit, 77...relay.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A raindrop sensor that detects rainfall conditions; a wiper motor that drives a wiper blade to reciprocate on the surface to be wiped to remove raindrops attached to the surface to be wiped; and the wiper motor. The switching state changes in conjunction, and when the wiper blade is at a predetermined rest position, the common contact is connected to the ground line, and when the wiper blade leaves the rest position and starts the wiping operation, it returns to the rest position. Until it returns, the cam switch whose common contact is connected to the power line and the raindrop sensor at intervals corresponding to the detection results,
a processing circuit that outputs a drive signal; and a switching state that changes in response to the drive signal from the processing circuit to selectively conduct the power input terminal of the wiper motor to the power supply line and a common contact of the cam switch. A wiper control device comprising: switching means. (2) At least each of first to fourth contacts is provided, the first contact corresponds to a low-speed power input terminal of a wiper motor that drives the wiper blade, and the second contact corresponds to a high-speed power input terminal of the wiper motor. , a third contact is connected to a power line, a fourth contact is electrically connected to a ground line when the wiper blade is in a predetermined rest position, and when the wiper blade leaves the rest position and starts a wiping operation,
The cam switch is connected to the power supply line until it returns to the rest position, the first contact and the fourth contact are electrically connected in the stop mode, and the first contact and the third contact are electrically conductive in the low speed mode. In a wiper control device including such a wiper switch in which the second contact and the third contact are electrically connected in the high-speed mode, the wiper control device includes: a setting means for setting an auto wiper operation; a raindrop sensor for detecting a rain condition; A control circuit interposed between a fourth contact and a cam switch, wherein when an auto wiper state is set in the setting means, at least the cam switch is activated at a wiping timing determined based on a detection result of the raindrop sensor. connects the fourth contact to the power line while separating from the cam switch until the wiper blade starts a wiping operation when the wiper blade becomes conductive to the power line;
A control circuit including such a switching means is provided, the low-speed power input terminal of the wiper motor is connected to the second contact of the wiper switch, and the high-speed power input terminal is connected to the first contact. Features a wiper control device.