JPS6240839Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an automobile window wiper.

In general, a windshield wiper for an automobile is configured so that it can be turned on and off and its operating mode can be selected by operating a multi-contact lever switch attached to a handle shaft, for example. There are usually three modes of operation: intermittent, low speed, and high speed. Each of these modes can be used depending on the situation. By the way, an automobile windshield wiper that has multiple operating modes is, for example, when the wiper starts operating, it is first operated in high-speed mode to quickly wipe away a large amount of water droplets, and then it is operated according to the situation. Depending on the situation, the vehicle may be operated in an intermittent or low-speed mode, and if the vehicle is momentarily splashed with water from an overtaking vehicle or an oncoming vehicle, the vehicle may be operated in a high-speed mode temporarily to maintain visibility. Its functions can only be utilized by using it properly. However, with conventional wipers, it is troublesome to use each operating mode as needed during driving. For example, in the event of a momentary splash of water, it would be troublesome to first set the wiper operating mode to high speed and then immediately return it to the original operating mode or state. Ta. For this reason, conventional multi-mode automotive window wipers
Although this seems convenient at first glance, it has the problem of becoming cumbersome to operate.

This idea was created in view of the above-mentioned conventional problems, and its purpose is to make it possible to use each operating mode flexibly depending on the situation in automobile windshield wipers that have multiple operating modes. An object of the present invention is to provide a windshield wiper for an automobile in which the functions of each operation mode are fully utilized and the operability thereof is improved.

Hereinafter, embodiments of this invention will be described in detail based on the drawings.

The figure is a circuit diagram showing an embodiment of the main part of the windshield wiper according to this invention. The feature of this invention is that, as shown in the same figure, in an automobile window wiper configured such that on/off switching and operation mode selection are performed by operating a multi-contact switch S, the above-mentioned switch S is A timer means 1 is provided which is activated even in a transient state when switched from OFF to ON by operation, and the operation mode is forcibly changed to the high speed mode by a signal _Pt emitted by the timer means 1 for a fixed period of time. The problem lies in the fact that it is configured to be set. Here, the switch S is a lever type switch attached to the handle shaft. In addition, the time limit means 1
is constituted by a time constant circuit consisting of a capacitor C1 and resistors R1 and R2. The switch S has four selection positions a, b, c, and d, and the first selection position a sets the off state. At the next selected position b, the intermittent signal generator 2 is operated, and the intermittent signal P _i generated from the generator 2 drives the relay RY2 intermittently. Thereby, the wiper motor M operates the wiper after a predetermined rest time even in the low speed mode. In other words, the intermittent mode is obtained at this selection position b. Further, at the next selected position c, the relay RY2 is driven continuously, and thereby the wiper motor M operates in a low speed mode, so that a so-called low speed mode is obtained. At selection position d, relay RY2 is driven through diode D1, and relay RY1 is also driven to drive wiper motor M.
The drive tap of is switched to the high speed side, thus obtaining the high speed mode.

Now, when the switch S leaves the initial selection position a, that is, when it is set from off to on, the power supply V+ is connected to the resistors R1 and R2.
A charging current flows into the capacitor C1 through the capacitor C1, which generates a voltage across the resistor R2, and when the voltage exceeds the input threshold of the buffer amplifier B1, the two transistors T _r 1 and T _r 2 are driven into conduction. be done. These two transistors T _r
1 and T _r 2 are connected to the respective relays RY1 and RY2 in order to forcibly drive the two relays RY1 and RY2 into conduction, respectively.
It is connected to the drive circuit of RY2 by OR logic, and therefore, by switching the switch S from off to on, the wiper motor M is driven at high speed, and a so-called high speed mode is set. However, this state does not last, and as the charging of the capacitor C1 progresses, the voltage across the resistor R2 gradually decreases, and as a result, the transistors T _r 1 and T _r 2 return to the non-conducting state again, and from then on, the voltage across the resistor R2 gradually decreases. The wiper motor M is now driven in the operating mode determined by the selected position of the switch S. As a result, the above switch S
Even in the transient state when the wiper is switched from off to on, the wiper will operate in high-speed mode for a certain period of time. And that time is the resistance R1,
It can be freely set by changing the values of R2 and capacitor C1.

With the above configuration, for example, when the wipers begin to move, a large amount of water droplets adhering to the windshield can be quickly wiped away, and then the wipers can be operated at a low speed or in an intermittent mode necessary to maintain visibility. Or, if you are momentarily splashed with water from an overtaking or passing vehicle, you can easily operate the wipers in high-speed mode with a single operation.

Although the above embodiment is composed of individual parts, the main control parts including the timer 1, the intermittent signal generator 2, etc. are carried out by a CPU, which is a general-purpose control means.
It is also possible to configure the system using a microprocessor (microprocessor). In addition, since other detailed configurations are the same as those of the prior art, illustrations and explanations will be omitted.

As described above, the automobile windshield wiper according to this invention allows each operating mode to be used flexibly depending on the situation with simple operation, and this allows the functions of each operating mode to be fully utilized. This will greatly improve operability.

[Brief explanation of the drawing]

The figure is a circuit diagram showing an embodiment of the main part of this invention. S...Switch, M...Wiper motor, 1...
...Timer means, 2...Intermittent signal generator, RY1,
RY2...Relay, T _r 1, T _r 2... Transistor, a, b, c, d... Selection position of switch S

Claims (1)

[Scope of utility model registration request] In an automobile windshield wiper configured to be turned on and off and to select an operating mode by operating a switch, a timer is provided that activates even in a transient state when the switch is turned from off to on by operating the switch. A windshield wiper for an automobile, characterized in that the operating mode is forcibly set to the high speed mode by a signal emitted for a certain period of time by the timer.