JPS6331470Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a switch that drives an on-vehicle load installed on an instrument panel or a center console. The present invention relates to an on-vehicle load drive device that prevents such damage from occurring.

Generally, drive switches 1a to 1e (hereinafter simply referred to as "switches") for vehicle loads 6a to 6e such as wipers and vehicle lights are provided on the instrument panel 3 or center console 5, as shown in FIG. By operating the switches 1a to 1e, the onboard loads 6a to 6e corresponding to the switches 1a to 1e are actuated, thereby driving the onboard loads 6a to 6e corresponding to the switches 1a to 1e. (See Figure 2). In addition, the first
In the figure, 7 indicates a steering wheel, and 9 indicates a shift lever.

However, although the above-mentioned switches should be operated based on the driver's judgment, some of the above-mentioned switches are located in positions where they can be operated by other passengers, especially from the passenger seat. For example, there is a risk that a passenger in the passenger seat may operate the switch by mistake or as a prank, causing the on-vehicle load to be driven unnecessarily.In such a case, the driver must turn off the switch that was operated. However, there is a problem in that it is time-consuming.

This device was made in view of the above, and in order to prevent the load on the vehicle from being unnecessarily driven by a switch operation by a passenger other than the driver,
Electrode plates are provided all around the steering wheel and on the drive switch, and when the same person touches both electrode plates, the capacitance of both electrode plates changes, driving the vehicle load of the switch.

Examples of this invention will be described below with reference to the drawings.

FIG. 3 and FIG. 4 show an embodiment of this invention, and its features include drive switches 10a to 10.
All of the switches up to d are touch-type switches, and electrode plates are provided on the touch portions of the drive switches 10a to 10d and around the entire circumference of the steering wheel 7, so that an occupant who is not touching the steering wheel 7 can touch the drive switches 10a to 10d. On-vehicle load 6 even if touched
A to 6d are not driven. Note that the same reference numerals as in FIGS. 1 and 2 indicate the same components.

FIG. 4 shows the circuit configuration of this embodiment. Reference numeral 11 indicates the drive switches 10a to 10 of the drive switches 10a to 10d of the polar plate 7' of the steering wheel 7.
The capacitance detection section detects a change in the capacitance between d' and outputs a drive command signal for the on-vehicle load corresponding to the switch whose capacitance has changed to the control section 13. The section 13 supplies drive signals to the on-vehicle loads 6a to 6d based on the drive command signal. The capacitance detection section 11 and the control section 13 constitute capacitance detection load driving means.

Next, the operation of this embodiment will be explained.

When the driver touches the electrode plate 10a' of the drive switch 10a while driving, for example, to drive the on-vehicle load 6a, the electrode plate 10a' and the steering wheel 7
Since the capacitance between the capacitance and the electrode plate 7' changes, the capacitance detection section 11 detects the change in capacitance at this time and outputs a signal corresponding to the capacitance.
That is, since a drive command signal for driving the on-vehicle load 6a is applied to the control unit 13, the on-vehicle load 6a
a starts driving by supplying a drive signal from the control section 13.

On the other hand, an occupant other than the driver switches the drive switch 10a.
Even if the electrode plates 10a' to 10d' of ~10d are touched, the electrode plate 7' of the steering wheel 7 is not touched, so there is no change in the capacitance between the two plates, and the on-vehicle loads 6a to 6d are not touched. is not driven.

As explained above, according to this invention, polar plates are provided on the drive switch and steering wheel of the on-vehicle load, and the electrostatic capacitance between the two plates changes when the same person touches both plates at the same time. Therefore, the on-vehicle load will not be driven when a person who is not touching the steering wheel operates the drive switch, and the on-vehicle load will not be driven when the drive switch is operated by a passenger other than the driver. Unnecessary driving can be prevented by this operation.

[Brief explanation of the drawing]

FIG. 1 shows a conventional example of an on-vehicle load driving device, FIG. 2 shows a circuit block diagram of the above-mentioned conventional example, FIG. 3 shows an embodiment of this invention, and FIG. 4 shows a circuit block diagram of the above-mentioned embodiment. Explanation of the symbols representing the main parts of the figure, 7... Steering wheel, 7'... Pole plate, 6a to 6d
... Vehicle load, 10a to 10d... Drive switch, 10a' to 10d'... Electrode plate, 11... Capacitance detection section, 13... Control section.

Claims (1)

[Scope of utility model registration request] A first electrode plate provided around the entire circumference of the steering wheel, a second electrode plate provided on a switch that drives an on-vehicle load, and changes in capacitance between the first and second electrode plates. 1. A vehicle-mounted load driving device comprising: capacitance detection load driving means for detecting and driving the vehicle-mounted load of a switch whose capacitance has changed.