JP2584926Y2 - Liquid level detector - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid level detecting device for measuring a liquid level in a fuel tank of a vehicle or the like, and more particularly to a conductor electrode of an insulating substrate.

[0002]

2. Description of the Related Art Conventionally, in a liquid amount detecting device, a conductor electrode 2 and a resistor 3 are formed by printing on an insulating substrate 4 made of ceramic or the like in a fuel tank 1 and further slide on the conductor electrode 2. A sliding body 6 having a sliding contact 5 is provided. The sliding body 6 moves from a float 7 that moves up and down according to the liquid level of the fuel on the insulating substrate 4 via an arm 8 according to the liquid level. It is movably connected. Therefore, the vertical movement of the liquid surface is transmitted to the sliding body 6 via the float 7 and the arm 8, and the sliding contact 5 slides on the conductor electrode 2, thereby sliding with the conductive electrode 2 on the insulating substrate 4. The resistance value changes depending on the position of the conductive electrode 2 in contact with the contact 5 and the change is displayed on a display (not shown) (for example,
See JP-A-62-34328).

[0003]

However, in the conventional liquid amount detecting device, the float 7, the arm 8, the insulating substrate 4
And the like, there is a considerable dimensional error, and the printing position shift also occurs in the conductive electrodes 2 and the like on the insulating substrate 4. Therefore, for example, despite the fact that the original remaining fuel amount is １ ／, Since the sliding contact 5 of the sliding body 6 does not contact the conductor electrode 2 on the insulating substrate 4 that generates a resistance value according to the remaining amount,
There is a problem that the display does not show the remaining amount １ ／.

[0004]

Accordingly, the present invention focuses on the above-mentioned problems, and even if there is a slight dimensional error in the components, for example, when the remaining amount of fuel is 正確, the display can be accurate. The object of the present invention is to provide a liquid amount detecting device which shows a half of the above, which is provided with a plurality of rows of conductor electrodes at appropriate intervals on an insulating substrate, and has a sliding contact on the conductor electrodes. In a liquid amount detection device in which a moving body slides and a resistor covers a part of the conductor electrode over a plurality of rows on the conductor electrode, at least one conductor electrode and at least one adjacent to the conductor electrode The conductor electrode is electrically connected to a portion where the sliding contact does not slide.

[0005]

A float and an arm are formed by electrically connecting a conductor electrode having a liquid amount that is desired to accurately indicate the remaining amount, for example, a conductor electrode indicating a remaining amount of １ ／, and a conductor electrode adjacent to the conductor electrode. Even if a dimensional error within the standard or a printing displacement of the insulating substrate or the like occurs on the insulating substrate or the like, it is possible to accurately display the amount of the liquid for which it is desired to accurately display the remaining amount.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to FIGS.

FIG. 1 is a view in which the liquid amount detecting device of the present invention is attached to a fuel tank, and FIG. 2 is a front view of the liquid amount detecting device of the present invention.

As shown in FIGS. 1 and 2, the liquid amount detecting device of the present invention forms a plurality of rows of conductor electrodes 2 in a fan shape by printing on a ceramic insulating substrate 4 at appropriate intervals. A resistor 3 covers a part of the conductor electrode 2 by printing over a plurality of rows. Here, for example, the remaining amount of liquid is 1
/ 2 and the conductor electrode 2 adjacent to the conductor electrode 2 are electrically connected at a portion where the sliding contact 5 does not contact the conductor electrode 2.

That is, due to the dimensional error of the float 7, the arm 8, the insulating substrate 4, etc. and the printing position shift of the insulating substrate 4, the sliding contact 5 shows 1/2 even though the remaining amount is originally 1/2. Even when the conductor electrode 2 is not in contact,
2 and the conductor electrode 2 adjacent to the conductor electrode 2 are electrically connected to each other. Contact with either one of the conductive electrodes 2 of FIG.

In the embodiment, the remaining amount of the liquid is 1/2, but this can be changed as appropriate and set arbitrarily.

Although not shown, unless the sliding contact 5 is in contact with the conductor electrode 2, the conductor electrode 2
And the conductor electrode 2 may be electrically connected anywhere.

[0012]

As described above, according to the present invention, even if there are some dimensional errors in the components of the liquid amount detection device, the remaining amount of the liquid amount to be accurately displayed can be accurately displayed. .

Further, by electrically connecting a certain conductor electrode and a conductor electrode adjacent to the conductor electrode at a portion where the sliding contact does not contact the conductor electrode, the thickness of the conductor electrode 2 does not need to be increased. Therefore, the sliding of the sliding contact 5 can be performed smoothly.

[Brief description of the drawings]

FIG. 1 is a diagram showing a state in which a liquid amount detection device of the present invention is attached to a fuel tank.

FIG. 2 is a front view of the liquid amount detection device of the present invention.

FIG. 3 is a diagram in which a conventional liquid amount detection device is attached to a fuel tank.

FIG. 4 is a front view of a conventional liquid amount detection device.

[Explanation of symbols]

 2 Conductor electrode 3 Resistor 4 Insulating board 5 Sliding contact 6 Sliding body

Claims (1)

(57) [Scope of request for utility model registration] 1. A plurality of rows of conductive electrodes are provided on an insulating substrate at appropriate intervals, a sliding body provided with sliding contacts slides on the conductive electrodes, and a part of the conductive electrodes is replaced by a resistor. In a liquid amount detection device applied over a plurality of rows on a conductor electrode, a certain conductor electrode and at least one conductor electrode adjacent to the conductor electrode are electrically connected at a portion where the sliding contact does not slide. A liquid amount detection device, which is connected to a device.