JPS5836028Y2 - Vehicle fluid level display device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a fluid level display device for a vehicle, and has excellent fluid level display accuracy.

Conventional liquid level display devices for vehicles display the liquid level by swinging the pointer in one direction on the liquid level display meter, and since the meter is miniaturized as a vehicle electrical component, The total swing angle of the pointer cannot be set to a large value, and therefore, the swing angle of the pointer corresponding to the change in liquid amount is relatively small, and the display is inferior in n degrees.

That is, FIG. 1 shows a conventional vehicle fluid level display device,
Variable resistor 1 whose resistance value changes linearly according to the amount of liquid
By changing the resistance value of ', the pointer 2'a of the meter 2' is displaced from the position of the broken line to the position of the solid line, and the pointer 2'a of the meter 2' is
It has a configuration that displays the liquid amount according to the displacement angle of a, and
The meter 2' has been downsized, and the total swing angle of the pointer 2'a is 1.
It is set at about 20°.

Therefore, the displacement angle of the pointer 2'a with respect to a change in liquid level is relatively small, and the accuracy of reading the liquid level is poor.
When the liquid level display device is used as a remaining fuel level display device for a vehicle, there is a risk that the fuel may unexpectedly run out while the vehicle is running, leading to a traffic accident.

Therefore, the present invention eliminates the above-mentioned conventional drawbacks, and has a configuration in which a constant non-linear resistance change is applied to a variable resistor whose resistance value changes depending on the liquid volume. It increases the angle of displacement of the pointer and provides excellent liquid level reading accuracy.

Reference numeral 1 denotes a variable resistor installed in the fuel tank 3, which includes a slider 7 having a float 8, and a conductive resistor that is electrically connected to the slider 7 and in which the slider 7 is movably inserted. It consists of a guide rod 6 and a resistor 4 whose both ends are electrically connected by a conductive wire 5.

The variable resistor 1 has a slider 7 having a float 8 that moves up and down in contact with the resistor 4 according to the amount of fuel in the tank 3, thereby controlling changes in the amount of fuel between the resistor 4 and the guide rod. It acts to convert changes in electrical resistance between terminals A and B provided on one side of each terminal.

A detection switch 9 is disposed at a position corresponding to the center of the resistor 4 in the tank 3, and is turned OFF when in contact with fuel and turned ON when not in contact with fuel.

The detection switch 9 can be a thermistor that switches depending on the temperature difference, or a switch that switches contacts depending on the displacement of the fuel level, or the like.

Reference numeral 2 denotes a tsuyuer meter, which displaces a bimetallic pointer 2a according to the amount of current applied to the hot wire 2b, and gives an instruction according to the amount of current applied.

Furthermore, the current to the hot wire 2b is supplied via a disconnection meter regulator that controls the intermittent action of the current.

12 is a meter regulator, and bimetal contact piece 1
A hot wire 12a is connected between the two contacts of a normally open contact 2b, and when a voltage is applied between the contacts, the hot wire 12a first generates heat and after a certain period of time, the bimetal contact piece 12b bends and closes the contact. .

Then, the hot wire 12a becomes de-energized, and the bimetal contact piece 1
2b is cooled by the surrounding air, returns to its original state after a certain period of time, opens the contact, and the hot wire 12a is energized again, and the bimetallic contact piece 12b repeats the opening and closing operation in the same manner.

The meter regulator 12 has a short opening/closing cycle corresponding to the magnitude of the applied voltage, and supplies a constant power per unit time to the tsuyuel meter 2.

11 is a light bulb installed on the display panel of the Tsuyuel meter 2.

Therefore, the power supply 13, the meter regulator 12, the tsuyuer meter 2, and the variable resistor 1 are connected in series,
Further, a series configuration of a light bulb 11 and a switch 9 is connected in parallel to the power source 13.

Next, the action will be explained.

As mentioned above, the variable resistor 1 converts a change in the amount of fuel in the tank 3 into a change in electrical resistance.
Because it has an annular configuration with both ends shorted by a conductor,
When the slider 7 moves to the center of the resistor 4, it exhibits the maximum resistance value.

As shown in the figure, when the fuel in tank 3 is 10t (liquid level C),
When the slider I is set to be located at the center of the resistor 4, when the fuel increases or decreases based on 1 (l), the resistance value of the variable resistor 1 will decrease successively.

Therefore, the pointer 2a of the fuel meter 2 moves back and forth in response to the amount of fuel, with the turning point at 10 tons of fuel, and indicates the amount of fuel by pointing to the fluid amount number or scale attached to the display panel.

A button and a detection switch 9 turn ONL and a light bulb 11 on when the fuel decreases below IOA.

Therefore, when this light bulb 11 is in the lighting state, the fuel meter 2 displays the amount of fuel less than 1Ot, and the light bulb 11
When the light is off, the fuel meter 2 will display a fuel amount of 10 or more.

The present invention has the above-mentioned configuration and operation, and has the following effects.

With a simple configuration of just shorting both ends of the single resistor connected to the variable resistor to form a ring connection configuration, the needle of the tsuyuer meter will automatically reciprocate as the liquid volume changes from the maximum value to the minimum value. By displaying this, the amount of displacement of the pointer is doubled compared to the conventional method, and the accuracy of displaying the liquid amount is doubled.

In addition, when the pointer of the Tsuyuel meter is turned back and forth, the display of the light emitting lamp automatically changes as the liquid level is detected by the detection switch, making it easy to distinguish between double liquid level display states caused by the back and forth movement of the pointer. At the same time, it can warn you that the liquid volume has decreased to less than half.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a conventional vehicle fluid level display device, and FIG. 2 is an explanatory diagram of a preferred embodiment of the device of the present invention. 1... Variable resistor, 2... Tsuyuru meter, 3... Fuel tank, 4... Resistor, 5... Conductor, 6 ...Guide rod, 7.
...Slider, 8...Float, 9...
...Detection switch, 11...Light bulb, 12...
...Meter regulator, 13...Power supply.

Claims (1)

[Scope of utility model registration request] In a liquid level display device for a vehicle that displays and operates a tsuyuer meter with a meter regulator by the resistance value changing action of a variable resistor whose resistance value changes depending on the liquid level, one resistor with a ring-shaped connection structure with both ends short-circuited is used. A variable resistor equipped with a variable resistor, a detection switch that detects the liquid amount in stages based on the maximum resistance value of the variable resistor and turns on the light, and a light emitting lamp that is energized and emits light when the detection switch is turned on. Features of vehicle fluid level display device.