JPH0350056A - Wiper drive unit - Google Patents

Abstract

PURPOSE:To control the driving speed of a wiper automatically without changing over an operating switch even with the change of the vehicle speed by providing a control unit for controlling the driving of a drive motor to increase the acting frequency of the wiper per unit time with the increase of the vehicle speed in a certain state of the operating switch. CONSTITUTION:Signals from an operating switch 10 and a speed detecting device 12 are inputted into a control unit 13. The control unit 13 then outputs such a signal as to drive a drive motor 15 to additionally increase the acting frequency of a wiper per unit time set by the operating switch 10 according to the speed increase on the basis of the inputted signal of the speed detecting device 12. Accordingly, even if the quantity of rain hitting the front glass changes according to the change of the vehicle speed, the driving speed of the wiper can be controlled automatically without operating the operating switch.

Description

[Detailed description of the invention] [Industrial application field j This invention relates to a wiper drive device.

[Conventional technology] Traditional wiper drive devices have high speed, medium speed, and low speed.

The wipers can be driven at multiple speeds, such as intermittently or intermittently, but the amount that the wipers hit the windshield increases as the speed of the vehicle increases, so the operation switch must be constantly switched depending on the speed of the vehicle. There is a need.

[Problems to be Solved by the Invention] The present invention provides a wiper drive device that eliminates the need to change an operation switch even when the speed of a vehicle changes.

[Means for Solving the Problems] The present invention provides a wiper drive device having a wiper drive motor and an operation switch for the drive motor, in which a signal from a speed detection device that detects the speed of a vehicle and a signal from the operation switch are transmitted to each other. It is characterized by including a control device configured to control the drive motor so that the number of wiper operations per unit time increases as the speed of the vehicle increases in at least one state in which the operation switch is present. The present invention provides a wiper drive device that does the following.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

In the block diagram of an embodiment of the present invention shown in FIG. 1, 10 is an operation switch that issues a signal to drive the wiper drive motor at high speed, medium speed, low speed, and intermittently, etc., and 12 is a vehicle speed detection device. , 13 is a control device with a built-in computer, and 15 is a wiper drive motor. The control device 13 inputs a signal from the operation switch 1O and a signal from the speed detection device 12, and operates when the speed increases based on the signal from the speed detection device 12 to the number of wiper operations per unit time set by the operation switch 10. No. 48 is emitted to drive the drive motor 15 by adding up the number of times. With this speed V, the number of wiper operations per unit time n
For example, in the case of zero intermittent drive, the wiper stop time may vary linearly as shown in Fig. 2 (a), or may vary stepwise as shown in Fig. 2 (b). The speed of the wiper may be changed only, or the speed of the wiper may be changed along with this stop time.

In addition, changing the number of wiper operations per unit time depending on the speed of the vehicle is not necessarily applied, for example, only when the operation switch 10 is used for intermittent drive, or only in drive states other than high speeds. It may not apply in all cases.

[Effects of the Invention] Since the present invention is configured as described above, even if the amount of rain hitting the windshield changes due to changes in the speed of the vehicle, there is no need to operate the operation switch. It has the effect of being adaptable.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a characteristic diagram thereof. 10 is an operation switch, 12 is a speed detection device, 13 is a control device, and 15 is a drive motor.

Claims (1)

[Claims] 1. In a wiper drive device having a wiper drive motor and an operation switch for this drive motor, at least the operation switch is provided by inputting a signal from a speed detection device that detects the speed of the vehicle and a signal from the operation switch. A wiper drive device comprising: a control device that controls the drive motor so that the number of wiper operations per unit time increases as the speed of the vehicle increases in one state.